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can't grab values from grid

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Grid

This is a migrated thread and some comments may be shown as answers.

Amanda asked on 15 Dec 2010, 08:41 PM

I have a rad grid on my web page and what I want to do is inline editing on only a few cells in a row. When the quantity cell is changed, I would like to be able to make some calculations and change some of the other cells in the grid that are read only. I have the grid up and have the edit button, but I don't know how to get those values to change the other cells before it updates the database. I've tried a couple different ways and the only values I get are   for every cell.
Here's my source code for the grid and sqldatasource.

<telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="False"

Skin="Telerik" AllowAutomaticDeletes="True"

DataSourceID="SqlDataSourceQuoteItems" GridLines="None"

AllowAutomaticInserts="True" OnItemDeleted="RadGrid1_ItemDeleted" OnItemInserted="RadGrid1_ItemInserted">

<MasterTableView DataSourceID="SqlDataSourceQuoteItems" CommandItemDisplay="TopAndBottom" AutoGenerateColumns="False"

DataKeyNames="id">

<RowIndicatorColumn>

<HeaderStyle Width="20px"></HeaderStyle>

</RowIndicatorColumn>

<ExpandCollapseColumn>

<HeaderStyle Width="20px"></HeaderStyle>

</ExpandCollapseColumn>

<Columns>

<telerik:GridEditCommandColumn ButtonType="ImageButton" UniqueName="EditCommandColumn">

<ItemStyle CssClass="MyImageButton" />

</telerik:GridEditCommandColumn>

<telerik:GridBoundColumn DataField="id" DataType="System.Int32" HeaderText="id"

ReadOnly="True" SortExpression="id" UniqueName="id" Visible="False">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="QuoteNo" HeaderText="QuoteNo"

SortExpression="QuoteNo" UniqueName="QuoteNo" Visible="False">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="Room" HeaderText="Room"

SortExpression="Room" UniqueName="Room" ColumnEditorID="GridTextBoxRoom">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="Elevation" HeaderText="Elevation"

SortExpression="Elevation" UniqueName="Elevation" ColumnEditorID="GridTextBoxElevation">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="PartNo" HeaderText="PartNo"

SortExpression="PartNo" UniqueName="PartNo" ColumnEditorID="GridTextBoxPartNo" ReadOnly="true">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="Qty" DataType="System.Double"

HeaderText="Qty" SortExpression="Qty" UniqueName="Qty" ColumnEditorID="GridNumericQty">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="ListPrice" DataType="System.Double"

HeaderText="Price" SortExpression="ListPrice" UniqueName="ListPrice" ColumnEditorID="GridTextBoxListPrice" ReadOnly="true">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="TotalPrice" DataType="System.Double"

HeaderText="Total Price" SortExpression="TotalPrice" UniqueName="TotalPrice" ColumnEditorID="GridTextBoxTotalPrice" ReadOnly="true">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="EachWeight" DataType="System.Double"

HeaderText="Weight" SortExpression="EachWeight" UniqueName="EachWeight" ColumnEditorID="GridTextBoxEachWeight" ReadOnly="true">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="TotalWeight" DataType="System.Double"

HeaderText="Total Weight" SortExpression="TotalWeight" UniqueName="TotalWeight" ColumnEditorID="GridTextBoxTotalWeight" ReadOnly="true">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="EachCubes" DataType="System.Double"

HeaderText="Cubes" SortExpression="EachCubes" UniqueName="EachCubes" ColumnEditorID="GridTextBoxEachCubes" ReadOnly="true">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn DataField="TotalCubes" DataType="System.Double"

HeaderText="Total Cubes" SortExpression="TotalCubes" UniqueName="TotalCubes" ColumnEditorID="GridTextBoxTotalCubes" ReadOnly="true">

</telerik:GridBoundColumn>

<telerik:GridButtonColumn ConfirmText="Delete this product?" ConfirmDialogType="RadWindow"

ConfirmTitle="Delete" ButtonType="ImageButton" CommandName="Delete" Text="Delete"

UniqueName="DeleteColumn">

<ItemStyle HorizontalAlign="Center" CssClass="MyImageButton" />

</telerik:GridButtonColumn>

</Columns>

<EditFormSettings ColumnNumber="7" CaptionDataField="PartNo" CaptionFormatString="Edit properties of Product {0}">

<FormTableItemStyle Wrap="False"></FormTableItemStyle>

<FormCaptionStyle CssClass="EditFormHeader"></FormCaptionStyle>

<FormMainTableStyle GridLines="None" CellSpacing="0" CellPadding="3" BackColor="White"

Width="100%" />

<FormTableStyle CellSpacing="0" CellPadding="2" Height="110px" BackColor="White" />

<FormTableAlternatingItemStyle Wrap="False"></FormTableAlternatingItemStyle>

<EditColumn ButtonType="ImageButton" InsertText="Insert Product" UpdateText="Update record"

UniqueName="EditCommandColumn1" CancelText="Cancel edit">

</EditColumn>

<FormTableButtonRowStyle HorizontalAlign="Right" CssClass="EditFormButtonRow"></FormTableButtonRowStyle>

</EditFormSettings>

</MasterTableView>

<ClientSettings>

<ClientEvents OnRowDblClick="RowDblClick" />

</ClientSettings>

</telerik:RadGrid>

<telerik:GridTextBoxColumnEditor ID="GridTextBoxRoom" runat="server" TextBoxStyle-Width="25px" />

<telerik:GridTextBoxColumnEditor ID="GridTextBoxElevation" runat="server" TextBoxStyle-width="25px" />

<telerik:GridTextBoxColumnEditor ID="GridTextBoxPartNo" runat="server" TextBoxStyle-width="90px" />

<telerik:GridTextBoxColumnEditor ID="GridTextBoxListPrice" runat="server" TextBoxStyle-width="45px" />

<telerik:GridTextBoxColumnEditor ID="GridTextBoxTotalPrice" runat="server" TextBoxStyle-width="45px" />

<telerik:GridTextBoxColumnEditor ID="GridTextBoxEachWeight" runat="server" TextBoxStyle-width="35px" />

<telerik:GridTextBoxColumnEditor ID="GridTextBoxTotalWeight" runat="server" TextBoxStyle-width="35px" />

<telerik:GridTextBoxColumnEditor ID="GridTextBoxEachCubes" runat="server" TextBoxStyle-width="40px" />

<telerik:GridTextBoxColumnEditor ID="GridTextBoxTotalCubes" runat="server" TextBoxStyle-width="40px" />

<telerik:GridTextBoxColumnEditor ID="GridNumericQty" runat="server" TextBoxStyle-width="35px" />

<telerik:RadWindowManager ID="RadWindowManager2" runat="server"></telerik:RadWindowManager>

<asp:SqlDataSource ID="SqlDataSourceQuoteItems" runat="server"

ConnectionString="Data Source=DWDATA2;Initial Catalog=DWJobInfo;Integrated Security=True"

ProviderName="System.Data.SqlClient"

SelectCommand="SELECT * FROM [tblMetalCabsQuoteItems] WHERE ([QuoteNo] = @QuoteNo) ORDER BY [Room], [Elevation]"

DeleteCommand="DELETE FROM tblMetalCabsItems WHERE id = @id">

<SelectParameters>

<asp:ControlParameter ControlID="lblQuoteNo" Name="QuoteNo" PropertyName="Text"

Type="String" />

</SelectParameters>

<DeleteParameters>

<asp:Parameter Name="id" Type="Int16" />

</DeleteParameters>

</asp:SqlDataSource>

I know I have to add some parameters for the update sqldatasource yet. But I figured I have to figure out this problem before i can even think about doing that part of it yet. So, when I click edit and change the values I need to, how do I grab all the values to do some calculations and then to update the database to then refresh the grid?

3 Answers, 1 is accepted

answered on 16 Dec 2010, 08:53 AM

Hello Amanda,

The following code snippet shows how to get the edited values.
C#:

protected void RadGrid1_UpdateCommand(object sender, GridCommandEventArgs e)

{

GridEditFormItem editItem = (GridEditFormItem)e.Item;

TextBox txtqty = (TextBox)editItem["Qty"].Controls[0];//accessing TextBox

int quantity = Convert.ToInt32(txtqty);//getting new value

// do your calculation

}

Also you can try the ExtractValuesFromItem method as described in the following documentation :
Updating values in-place and with edit forms

Thanks,
Princy.

answered on 16 Dec 2010, 03:13 PM

When I run the code you gave me, it errors on the first line.
Unable to cast object of type 'Telerik.Web.UI.GridDataItem' to type 'Telerik.Web.UI.GridEditFormItem'.

So I then tried this:

Dim editItem As GridEditFormItem = DirectCast(TryCast(e.Item, GridDataItem).EditFormItem, GridEditFormItem)

But then I get the error on the next line:
Object reference not set to an instance of an object.

I tried these two things:

Dim txtqty As TextBox = New TextBox

txtqty = DirectCast(editItem.FindControl("GridNumericQty"), TextBox)

Dim txtqty As TextBox = New TextBox

txtqty = DirectCast(editItem("Qty").Controls(0), TextBox)

For each way, I tried both 'Qty' and 'GridNumericQty' and I'm still getting the same error.

Any ideas?