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Load Delete column based on data

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TSCGlobal
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TSCGlobal asked on 19 Apr 2010, 09:41 PM
I have a little  bit of a challenging task, and I am not certain how to go about accomplishing it.  I have a grid that loads orders (detail table is the items in an order number) for the purposes of administering them.  This will primarily be used for our customer service reps.  What I need to do is to make the delete button invisible if the order status = 'pending', because at that point the order cannot be deleted from the web portal, but must rather be deleted using another method.  I hope someone can point me in the right direction of how I can accomplish this task.  Here's the grid code:

                        <telerik:RadGrid ID="rgOrderView" runat="server" AllowPaging="True" AllowSorting="True"   
                            DataSourceID="dsSelectOrders" GridLines="None" Width="95%" PageSize="25" Skin="Black">  
                            <MasterTableView AutoGenerateColumns="False" DataSourceID="dsSelectOrders" Width="95%" 
                                DataKeyNames="UserID, OrderID">  
                                <RowIndicatorColumn> 
                                    <HeaderStyle Width="20px"></HeaderStyle> 
                                </RowIndicatorColumn> 
                                <ExpandCollapseColumn> 
                                    <HeaderStyle Width="20px"></HeaderStyle> 
                                </ExpandCollapseColumn> 
                                <Columns> 
                                    <telerik:GridBoundColumn DataField="ExternalOrderID" DataType="System.Int32" HeaderText="Order ID"   
                                    ReadOnly="True" SortExpression="ExternalOrderID" UniqueName="ExternalOrderID" /> 
 
                                    <telerik:GridBoundColumn DataField="StoreNum" HeaderText="Store Number"   
                                        SortExpression="StoreNum" UniqueName="StoreNum" /> 
                                    <telerik:GridBoundColumn DataField="POGNum" HeaderText="POG Number"   
                                        SortExpression="POGNum" UniqueName="POGNum" /> 
                                    <telerik:GridBoundColumn DataField="Description" HeaderText="POG Description"   
                                        SortExpression="Description" UniqueName="Description" /> 
                                    <telerik:GridBoundColumn DataField="EntryDate" DataType="System.DateTime"   
                                        HeaderText="Entry Date" SortExpression="EntryDate" UniqueName="EntryDate" /> 
                                    <telerik:GridBoundColumn DataField="Status" HeaderText="Status" SortExpression="Status"   
                                        UniqueName="Status" /> 
                                    <telerik:GridBoundColumn DataField="OrderID" SortExpression="OrderID" UniqueName="OrderID"   
                                        Visible="false"/>  
                                </Columns> 
                                  
                                <NestedViewSettings DataSourceID="dsSelectOrderDetails">  
                                    <ParentTableRelation> 
                                        <telerik:GridRelationFields MasterKeyField="OrderID" DetailKeyField="OrderID" /> 
                                    </ParentTableRelation> 
                                </NestedViewSettings> 
 
                                <NestedViewTemplate> 
                                    <telerik:RadGrid ID="rgOrderDetails" runat="server" AutoGenerateColumns="False" DataSourceID="dsSelectOrderDetails" 
                                                     AllowSorting="true" AllowFilteringByColumn="true" > 
                                        <MasterTableView AutoGenerateColumns="False" DataSourceID="dsSelectOrderDetails">  
                                            <Columns> 
                                                <telerik:GridBoundColumn DataField="ItemNum" HeaderText="Item Number"   
                                                    SortExpression="ItemNum" UniqueName="ItemNum" /> 
                                                  
                                                <telerik:GridBoundColumn DataField="Quantity" HeaderText="Quantity"   
                                                    SortExpression="Quantity" UniqueName="Quantity" /> 
                                            </Columns> 
                                        </MasterTableView> 
                                        <HierarchySettings ExpandTooltip="Expand this Order to see item detail." /> 
                                    </telerik:RadGrid> 
                                </NestedViewTemplate> 
                            </MasterTableView> 
                        </telerik:RadGrid> 
Is there an easy way to load the delete button dynamically as the grid is filled with data based on the value of the order status?  At this point, even a starting point would be helpful...

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Shinu
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answered on 20 Apr 2010, 05:17 AM
Hello Beemer,

The better solution is you can add a GridButtonColumn for delete button and access it in the ItemDataBound event. From there based on the value of the order status make the delete button visible/invisible. I hope the following code will help you.

aspx:

 

<telerik:GridButtonColumn Text="Delete" CommandName="Delete" UniqueName="DeleteButton" /> 


C#:
protected void RadGrid1_ItemDataBound(object sender, Telerik.Web.UI.GridItemEventArgs e) 
    { 
        if (e.Item is GridDataItem) 
        { 
            GridDataItem item = (GridDataItem)e.Item; 
            string status = item["Status"].Text; 
            LinkButton DeleteButton = (LinkButton)item["DeleteButton"].Controls[0]; 
            if (status == "pending"
            { 
                DeleteButton.Visible = false
 
            } 
        } 
    } 

Regards,
Shinu.
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TSCGlobal
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answered on 20 Apr 2010, 12:09 PM
I'll play around with this idea today.  We use vb.net for our codebehind, but I think I can reason it out based on what you've provided.  I'll keep you posted. :)
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TSCGlobal
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answered on 20 Apr 2010, 02:32 PM
Ok...this is what I have so far...

.aspx page:
<telerik:RadGrid ID="rgOrderView" runat="server" AllowPaging="True" AllowSorting="True"   
    DataSourceID="dsSelectOrders" GridLines="None" Width="95%" PageSize="25"   
    Skin="Black" AutoGenerateColumns="False">  
    <MasterTableView DataSourceID="dsSelectOrders" Width="95%" 
        DataKeyNames="UserID, OrderID">  
        <RowIndicatorColumn> 
            <HeaderStyle Width="20px"></HeaderStyle> 
        </RowIndicatorColumn> 
        <ExpandCollapseColumn> 
            <HeaderStyle Width="20px"></HeaderStyle> 
        </ExpandCollapseColumn> 
        <Columns> 
            <telerik:GridBoundColumn DataField="ExternalOrderID" DataType="System.Int32" HeaderText="Order ID"   
            ReadOnly="True" SortExpression="ExternalOrderID" UniqueName="ExternalOrderID" /> 
            <telerik:GridBoundColumn DataField="StoreNum" HeaderText="Store Number" SortExpression="StoreNum"   
                UniqueName="StoreNum" /> 
            <telerik:GridBoundColumn DataField="POGNum" HeaderText="POG Number" SortExpression="POGNum"   
                UniqueName="POGNum" /> 
            <telerik:GridBoundColumn DataField="EntryDate" DataType="System.DateTime" HeaderText="Entry Date"   
                SortExpression="EntryDate" UniqueName="EntryDate" /> 
            <telerik:GridBoundColumn DataField="Status" HeaderText="Status" SortExpression="Status"   
                UniqueName="Status" /> 
            <telerik:GridButtonColumn CommandName="Delete" Text="Delete" UniqueName="DeleteButton" /> 
 
        </Columns> 
          
        <NestedViewSettings DataSourceID="dsSelectOrderDetails">  
            <ParentTableRelation> 
                <telerik:GridRelationFields MasterKeyField="OrderID" DetailKeyField="OrderID" /> 
            </ParentTableRelation> 
        </NestedViewSettings> 
 
        <NestedViewTemplate> 
            <telerik:RadGrid ID="rgOrderDetails" runat="server" AutoGenerateColumns="False" DataSourceID="dsSelectOrderDetails">  
                <MasterTableView AutoGenerateColumns="False" DataSourceID="dsSelectOrderDetails">  
                    <Columns> 
                        <telerik:GridBoundColumn DataField="ItemNum" HeaderText="Item Number" SortExpression="ItemNum" UniqueName="ItemNum" /> 
                          
                        <telerik:GridBoundColumn DataField="Quantity" HeaderText="Quantity" SortExpression="Quantity" UniqueName="Quantity" /> 
                    </Columns> 
                </MasterTableView> 
                <HierarchySettings ExpandTooltip="Expand this Order to see item detail." /> 
            </telerik:RadGrid> 
        </NestedViewTemplate> 
    </MasterTableView> 
</telerik:RadGrid> 
and then in the code behind is as follows:

    Private Sub rgOrderView_ItemDataBound(ByVal sender As ObjectByVal e As Telerik.Web.UI.GridItemEventArgs) Handles rgOrderView.ItemDataBound  
 
        Dim DataItem As GridDataItem = e.Item  
        Dim OrderStatus As String 
        Dim DeleteButton As LinkButton  
 
        If e.Item Is GridDataItem Then 
 
            OrderStatus = DataItem("Status").Text  
            DeleteButton = DataItem("btnDelete").Controls(0)  
 
            If OrderStatus = "pending" Then 
                DeleteButton.Visible = False 
            End If 
        End If 
 
    End Sub 
The "IF" statement there that is "if e.item Is GridDataItem..." is throwing an error...can anyone give me a little syntax help here?  I wasn't entirely sure how the C# "translated" here...  Once I get that squared away, I can try it out and see if it will work.

Also, the line "Dim DataItem as GridDataItem = e.Item" causes issues.  I get the following error:

Unable to cast object of type 'Telerik.Web.UI.GridPagerItem' to type 'Telerik.Web.UI.GridDataItem'.
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TSCGlobal
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answered on 21 Apr 2010, 02:27 PM
Ok, I have the master table working, but can't seem to figure out how to get the detail table to do the same thing regarding the delete button.  I thought it would be as easy as adding a reference to it as I did the first, but it wouldn't work for me.  If anyone could help me out in getting the delete button visibility to = false based on order status of the master table, it would be much appreciated.  Here's the working code...

    Private Sub rgOrders_ItemDataBound(ByVal sender As ObjectByVal e As Telerik.Web.UI.GridItemEventArgs) Handles rgOrders.ItemDataBound  
 
        If TypeOf e.Item Is GridDataItem Then 
            Dim item As GridDataItem = DirectCast(e.Item, GridDataItem)  
            Dim status As String = item("Status").Text  
            Dim DeleteButton As LinkButton = DirectCast(item("DeleteButton").Controls(0), LinkButton)  
  
            If status = "Processing" Then 
 
                DeleteButton.Visible = False 
            End If 
        End If 
 
    End Sub 
The table is pretty much the same as in my last post.
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Veli
Telerik team
answered on 23 Apr 2010, 06:46 AM
Hello beemer,

The problem with this code in the context of multiple nested tables is that you may not have the "Status" column in every detail table. Therefore, if you know you need to apply this logic only for the items in the master table, you need to incorporate an additional check for that:

Private Sub rgOrders_ItemDataBound(ByVal sender As Object, ByVal e As Telerik.Web.UI.GridItemEventArgs) Handles rgOrders.ItemDataBound 
    If TypeOf e.Item Is GridDataItem Then
        Dim item As GridDataItem = DirectCast(e.Item, GridDataItem)        
        If item.OwnerTableView = rgOrders.MasterTableView Then
            Dim status As String = item("Status").Text 
            Dim DeleteButton As LinkButton = DirectCast(item("DeleteButton").Controls(0), LinkButton) 
            If status = "Processing" Then
                DeleteButton.Visible = False
            End If
        End If     
    End If
End Sub

In the above modified code snippet, I am checking if the item for which ItemDataBound event is fired belongs to the master table. If not, I do not want to check for the Status field, because my detail tables do not have a Status field.

If you need to similarly check for other detail tables, you need to give your detail table a Name and check for this name:

Private Sub rgOrders_ItemDataBound(ByVal sender As Object, ByVal e As Telerik.Web.UI.GridItemEventArgs) Handles rgOrders.ItemDataBound 
    If TypeOf e.Item Is GridDataItem Then
        Dim item As GridDataItem = DirectCast(e.Item, GridDataItem)        
        If item.OwnerTableView.Name = "MyDetailTableName" Then
            '...
        End If     
    End If
End Sub


Greetings,
Veli
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TSCGlobal
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answered on 23 Apr 2010, 12:18 PM
Ok, that helps me out a little, but let me make sure I understand this clearly:

If the detail table does NOT have a status column (which it doesn't) I can still remove the delete and edit buttons based on the status of the order from the Master table? This is exactly what I need to do, because an order that is "Processing" means that the order has been pulled off the web portal and put into the accounting/shipping system (it's kinda weird the way this company has this set up...) which means that the order must be deleted/edited in those systems, and not on the web portal database.

Do I still need to name the detail table and add the snippet of code you provided then, because it doesn't seem to be removing the delete/edit buttons in the detail table based on the status column in the master table currently.
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Veli
Telerik team
answered on 26 Apr 2010, 07:10 AM
Hello beemer,

It's a little different for your particular scenario then. You still need to give your detail table a name, though. Unless you have a single nested level, in which case you could simply check if the owner table is different from the master table, which would imply the table is the nested one.

So, to clarify. The master table has a delete column and  a Status field. The detail table does not have a Status field, but has a delete column as well. You need the delete buttons removed for parent items that have a "Processing" , as well as their nested items.

If I got you correct, here is the modified ItemDataBound event handler:

Private Sub rgOrders_ItemDataBound(ByVal sender As Object, ByVal  e As Telerik.Web.UI.GridItemEventArgs) Handles rgOrders.ItemDataBound
    If TypeOf e.Item Is GridDataItem Then
        Dim item As GridDataItem = DirectCast(e.Item, GridDataItem)       
        Dim status As String = String.Empty
         
        If item.OwnerTableView = rgOrders.MasterTableView Then
            status = item("Status").Text
        Else
            status = item.OwnerTableView.ParentItem("Status").Text;
        End If
         
        Dim DeleteButton As LinkButton = DirectCast(item("DeleteButton").Controls(0), LinkButton)
        If status = "Processing" Then
            DeleteButton.Visible = False
        End If
    End If
End Sub

So, in the above snippet, I extract the Status field in 2 cases. The first case is when the current databound item (e.Item) is from the master table. In this case, the item itself has a Status field, whose text I get directly.

The second case is when the current item (e.Item) is from the detail table. In this case, I need to get to the parent data item, that is the item from the master table that has a child table containing the current item.

Once I find the status value, the logic for both cases is identical. I have a delete column in both the master and the detail table, so, in either case, I need to find and hide that button.

As I mentioned above, the only assumption this piece of code does is that there is a single level of nested tables. Therefore an item can belong either to the master table, or to the detail table. If there were more nested levels, things would have gotten a little more complicated in terms of finding the Status field from the topmost master table.

Let me know how that works for you.

Kind regards,
Veli
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TSCGlobal
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answered on 26 Apr 2010, 02:11 PM
This works for the master table, but the delete/edit buttons still appear in the detail table. The nested view has another Rad Grid in it.  Here's the table .aspx code:

<telerik:RadGrid ID="rgOrders" runat="server" DataSourceID="dsSelectOrders" GridLines="None">  
    <MasterTableView AutoGenerateColumns="False" DataKeyNames="OrderID" DataSourceID="dsSelectOrders">  
        <Columns> 
            <telerik:GridBoundColumn DataField="OrderID" HeaderText="OrderID"   
                ReadOnly="True" SortExpression="OrderID" UniqueName="OrderID" Visible="false">  
            </telerik:GridBoundColumn> 
            <telerik:GridBoundColumn DataField="ExternalOrderID" DataType="System.Int32"   
                HeaderText="Order ID" ReadOnly="True" SortExpression="ExternalOrderID"   
                UniqueName="ExternalOrderID">  
            </telerik:GridBoundColumn> 
            <telerik:GridBoundColumn DataField="StoreNum" HeaderText="Store #"   
                SortExpression="StoreNum" UniqueName="StoreNum">  
            </telerik:GridBoundColumn> 
            <telerik:GridBoundColumn DataField="POGNum" HeaderText="POG #"   
                SortExpression="POGNum" UniqueName="POGNum">  
            </telerik:GridBoundColumn> 
            <telerik:GridBoundColumn DataField="EntryDate" DataType="System.DateTime"   
                HeaderText="Entry Date" SortExpression="EntryDate" UniqueName="EntryDate">  
            </telerik:GridBoundColumn> 
            <telerik:GridBoundColumn DataField="UserID" HeaderText="User ID"   
                SortExpression="UserID" UniqueName="UserID">  
            </telerik:GridBoundColumn> 
            <telerik:GridBoundColumn DataField="Status" HeaderText="Status"   
                SortExpression="Status" UniqueName="Status">  
            </telerik:GridBoundColumn> 
            <telerik:GridButtonColumn CommandName="Delete" Text="Delete"   
                UniqueName="DeleteButton">  
            </telerik:GridButtonColumn> 
            <telerik:GridEditCommandColumn ButtonType="LinkButton">  
            </telerik:GridEditCommandColumn> 
        </Columns> 
          
        <NestedViewSettings DataSourceID="dsSelectOrderDetails">  
            <ParentTableRelation> 
                <telerik:GridRelationFields MasterKeyField="OrderID" DetailKeyField="OrderID" /> 
            </ParentTableRelation> 
        </NestedViewSettings> 
 
        <NestedViewTemplate> 
            <telerik:RadGrid ID="rgOrderDetails" runat="server" AutoGenerateColumns="False"   
                DataSourceID="dsSelectOrderDetails" AllowSorting="true" AllowFilteringByColumn="true">  
                <MasterTableView AutoGenerateColumns="False" DataSourceID="dsSelectOrderDetails">  
                    <Columns> 
                        <telerik:GridBoundColumn DataField="ItemNum" HeaderText="Item Number"   
                            SortExpression="ItemNum" UniqueName="ItemNum" /> 
                          
                        <telerik:GridBoundColumn DataField="Quantity" HeaderText="Quantity"   
                            SortExpression="Quantity" UniqueName="Quantity" /> 
                          
                        <telerik:GridButtonColumn CommandName="Delete" Text="Delete"   
                            UniqueName="DeleteButton2">  
                        </telerik:GridButtonColumn> 
                        <telerik:GridButtonColumn CommandName="Edit" Text="Edit" UniqueName="EditCommandColumn">  
                              
                        </telerik:GridButtonColumn> 
                    </Columns> 
                </MasterTableView> 
                <HierarchySettings ExpandTooltip="Expand this Order to see item detail." /> 
            </telerik:RadGrid> 
        </NestedViewTemplate> 
        <EditFormSettings> 
            <EditColumn ButtonType="LinkButton" EditText="Edit" InsertText="Insert" UpdateText="Update"   
                 CancelText="cancel" UniqueName="EditCommandColumn1">  
            </EditColumn> 
        </EditFormSettings> 
    </MasterTableView> 
</telerik:RadGrid> 
If there's a better way to do the nested view, I'd be more than willing to change it to make this work.  I used the code you included, with one modification. For the line:

If item.OwnerTableView = rgOrders.MasterTableView Then

I changed it because I was getting an error that said;

Error 1 Operator '=' is not defined for types 'Telerik.Web.UI.GridTableView' and 'Telerik.Web.UI.GridTableView'.

So the modified code looks like this:
    Private Sub rgOrders_ItemDataBound(ByVal sender As ObjectByVal e As Telerik.Web.UI.GridItemEventArgs) Handles rgOrders.ItemDataBound  
 
        If TypeOf e.Item Is GridDataItem Then 
 
            Dim item As GridDataItem = DirectCast(e.Item, GridDataItem)  
            Dim status As String = String.Empty  
            Dim EditButton As LinkButton = DirectCast(item("EditCommandColumn").Controls(0), LinkButton)  
 
            If item.OwnerTableView Is rgOrders.MasterTableView Then 
                status = item("Status").Text  
            Else 
                status = item.OwnerTableView.ParentItem("Status").Text  
            End If 
 
            Dim DeleteButton As LinkButton = DirectCast(item("DeleteButton").Controls(0), LinkButton)  
            If status = "Processing" Then 
                DeleteButton.Visible = False 
                EditButton.Visible = False 
            End If 
 
        End If 
 
    End Sub 
0
Veli
Telerik team
answered on 28 Apr 2010, 11:20 AM
Hi beemer,

The scenario you are using is just fine and we can get this working without you having to change the way you have setup your hierarchy. So, to clarify, the example ItemDataBound event I sent you referred to the scenario where you have nested table views in a single RadGrid. In your case, you have a NestedViewTemplate with a second RadGrid inside, in which situation, the ItemDataBound event should be different and I apologize for misleading you.  Try the following instead:

ItemDataBound event handler for parent RadGrid (rgOrders):

Private Sub rgOrders_ItemDataBound(ByVal sender As Object, ByVal e As Telerik.Web.UI.GridItemEventArgs) Handles rgOrders.ItemDataBound 
    If TypeOf e.Item Is GridDataItem Then
        Dim item As GridDataItem = DirectCast(e.Item, GridDataItem) 
        Dim status As String = item("Status").Text
         
        Dim EditButton As LinkButton = DirectCast(item("EditCommandColumn").Controls(0), LinkButton) 
        Dim DeleteButton As LinkButton = DirectCast(item("DeleteButton").Controls(0), LinkButton) 
         
        If status = "Processing" Then
            DeleteButton.Visible = False
            EditButton.Visible = False
        End If
    End If
End Sub

ItemDataBound event handler for nested RadGrid (rgOrderDetails):

Private Sub rgOrderDetails_ItemDataBound(ByVal sender As Object, ByVal e As Telerik.Web.UI.GridItemEventArgs)
    If TypeOf e.Item Is GridDataItem Then
        Dim item As GridDataItem = DirectCast(e.Item, GridDataItem) 
         
        Dim EditButton As LinkButton = DirectCast(item("EditCommandColumn").Controls(0), LinkButton) 
        Dim DeleteButton As LinkButton = DirectCast(item("DeleteButton").Controls(0), LinkButton) 
         
        Dim parentNestedViewItem = DirectCast(item.OwnerTableView.OwnerGrid.NamingContainer, Telerik.Web.UI.GridNestedViewItem)
        Dim status As String = parentNestedViewItem.ParentItem("Status").Text
         
        If status = "Processing" Then
            DeleteButton.Visible = False
            EditButton.Visible = False
        End If
    End If
End Sub

In the above two event handlers, we check the Status of the current grid item for the parent rgOrders grid and hide the Delete and Edit buttons. For the nested grid, however, we check the Status text of the parent Grid item that is holding the current inner grid in its nested view template. I think this should work for you now.


Best wishes,
Veli
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TSCGlobal
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answered on 29 Apr 2010, 05:42 PM
I could never get it working with the nested view (grid within a grid).  I changed it to a detail table.  Here's the final code;

*.aspx code:
<telerik:RadGrid ID="rgOrders" runat="server" DataSourceID="dsSelectOrders" GridLines="None">  
    <MasterTableView AutoGenerateColumns="False" DataKeyNames="OrderID" DataSourceID="dsSelectOrders">  
        <ExpandCollapseColumn Visible="True">  
        </ExpandCollapseColumn> 
        <Columns> 
            <telerik:GridBoundColumn DataField="OrderID" HeaderText="OrderID"   
                ReadOnly="True" SortExpression="OrderID" UniqueName="OrderID" Visible="false"   
                HeaderTooltip="Click the column name to sort in ascending or descending form.">  
            </telerik:GridBoundColumn> 
            <telerik:GridBoundColumn DataField="ExternalOrderID" DataType="System.Int32"   
                HeaderText="Order ID" ReadOnly="True" SortExpression="ExternalOrderID"   
                UniqueName="ExternalOrderID">  
            </telerik:GridBoundColumn> 
            <telerik:GridBoundColumn DataField="StoreNum" HeaderText="Store #"   
                SortExpression="StoreNum" UniqueName="StoreNum">  
            </telerik:GridBoundColumn> 
            <telerik:GridBoundColumn DataField="POGNum" HeaderText="POG #"   
                SortExpression="POGNum" UniqueName="POGNum">  
            </telerik:GridBoundColumn> 
            <telerik:GridBoundColumn DataField="EntryDate" DataType="System.DateTime"   
                HeaderText="Entry Date" SortExpression="EntryDate" UniqueName="EntryDate">  
            </telerik:GridBoundColumn> 
            <telerik:GridBoundColumn DataField="UserID" HeaderText="User ID"   
                SortExpression="UserID" UniqueName="UserID">  
            </telerik:GridBoundColumn> 
            <telerik:GridBoundColumn DataField="Status" HeaderText="Status"   
                SortExpression="Status" UniqueName="Status">  
            </telerik:GridBoundColumn> 
            <telerik:GridButtonColumn CommandName="Delete" Text="Delete"   
                UniqueName="DeleteButton">  
            </telerik:GridButtonColumn> 
            <telerik:GridEditCommandColumn ButtonType="LinkButton">  
            </telerik:GridEditCommandColumn> 
        </Columns> 
        <DetailTables> 
            <telerik:GridTableView runat="server" DataSourceID="dsSelectOrderDetails"   
                DataKeyNames="OrderID" AllowPaging="True" AllowSorting="True"   
                GridLines="Horizontal">  
                <ParentTableRelation> 
                    <telerik:GridRelationFields MasterKeyField="OrderID" DetailKeyField="OrderID" /> 
                </ParentTableRelation>                                      
                <Columns> 
                    <telerik:GridBoundColumn DataField="ItemNum" HeaderText="Item Number" SortExpression="ItemNum"   
                        UniqueName="ItemNum" /> 
                    <telerik:GridBoundColumn DataField="Quantity" HeaderText="Quantity" SortExpression="Quantity"   
                        UniqueName="Quantity" /> 
                    <telerik:GridButtonColumn CommandName="Delete" Text="Delete" UniqueName="DeleteButton" /> 
                    <telerik:GridButtonColumn CommandName="Edit" Text="Edit" UniqueName="EditCommandColumn" /> 
                </Columns> 
                <EditFormSettings> 
                    <EditColumn UniqueName="EditCommandColumn1">  
                    </EditColumn> 
                </EditFormSettings> 
            </telerik:GridTableView> 
        </DetailTables> 
        <EditFormSettings> 
            <EditColumn UniqueName="EditCommandColumn1">  
            </EditColumn> 
        </EditFormSettings> 
    </MasterTableView> 
</telerik:RadGrid> 

here's the vb.net code:
    Private Sub rgOrders_ItemDataBound(ByVal sender As ObjectByVal e As Telerik.Web.UI.GridItemEventArgs) Handles rgOrders.ItemDataBound  
        If TypeOf e.Item Is GridDataItem Then 
            Dim item As GridDataItem = DirectCast(e.Item, GridDataItem)  
            Dim status As String = String.Empty  
 
            If item.OwnerTableView Is rgOrders.MasterTableView Then 
                status = item("Status").Text  
            Else 
                status = item.OwnerTableView.ParentItem("Status").Text  
            End If 
 
            Dim DeleteButton As LinkButton = DirectCast(item("DeleteButton").Controls(0), LinkButton)  
            Dim EditButton As LinkButton = DirectCast(item("EditCommandColumn").Controls(0), LinkButton)  
 
            If status = "Processing" Then 
                DeleteButton.Visible = False 
                EditButton.Visible = False 
            End If 
        End If 
    End Sub 

Thanks to everyone for the help.
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Answers by
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