Add Columns by Button Press

[Simon]

Hi,I need some help with adding column dynamicly by pressing button,
Example:
<asp:textbox runat="server" ID="txtName" />
 <asp:Button runat="server" ID="btnAddColumn" Text="Add Column" />
 <telerik:RadGrid runat="server" ID="gridData" AutoGenerateColumns="false" ShowHeader="true"   Width="100%" Height="500px" ShowStatusBar="true" >
        <MasterTableView  EditMode="InPlace" 
ShowHeader="true" ShowFooter ="true" ShowHeadersWhenNoRecords="true"  >
..........
 </MasterTableView>
    </telerik:RadGrid>

on server side ,on button click event i tryingh to add  GridBoundColumn with name from txtName
and HeaderText from txtName and DataField from txtName,I also updating my datasource with new column
by nothing,the Column is added (i testing it with additional postback button pressing) but there is no visible Header text on client side and the header text on server side is empty too,

    Dim ContainerColumn As New GridBoundColumn
                gridData.MasterTableView.Columns.Add(ContainerColumn)
                AddColumnToData(txtName.Text)
                ContainerColumn.Display = True
                ContainerColumn.HeaderText = txtName.Text
                ContainerColumn.DataField = txtName.Text
                ContainerColumn.UniqueName = ContainerColumn.DataField

[Shinu]

Hi Simon,

Please try the following code snippet in the button click to generate the columns.

C#:

protected void Button1_Click(object sender, EventArgs e)
{
  string value = TextBox1.Text;
  GridBoundColumn boundColumn;
  boundColumn = new GridBoundColumn();
  RadGrid1.MasterTableView.Columns.Add(boundColumn);
  boundColumn.DataField = value;
  boundColumn.HeaderText = value;
  boundColumn.UniqueName = value;
  RadGrid1.Rebind();
}

Thanks,
Shinu

[Simon]

Thanks for the fast response,Additional problem,
when i adding columns in this scenario:
1)Add break with value 5
2)Add break with value 7
3)Add Container with some data from dropdown 
i got an error:Invalid column group configuration! Column "containers" cannot be after column "CONTAINER_RATEBLBULK"
Line 76: gridData.Rebind()
How can i send you sources?

[Simon]

The sources
Just rename the file with rar extention

[Simon]

Another thing 'i see after adding 2 columns ,grid have 2 adding some empty columns on client?

[Shinu]

Hi Simon,

I'm not clear about your issues. Please elaborate with screenshots. Paste your code snippet here as well.
You can take a look at the following article on Creating a RadGrid Programmatically which may help you to create columns.

Thanks,
Shinu

[Simon]

Hi,
Actually I'm looking for some example to add/remove Columns with RadGrid programmaticly.
It will be Form with textbox,and button outside the grid.After clicking the button it must add Column to DataTable and to RagGrid
The additional thisg is what grid must have some Static columns .
Can you provide some examples

[Shinu]

Hi Simon,

Please take a look at the sample code snippet. Provide your code snippet for more help.

ASPX:

<asp:TextBox ID="colTxtBox" runat="server"></asp:TextBox>
<asp:Button ID="ColCreateBtn" runat="server" Text="Create Column" OnClick="ColCreateBtn_Click" />
<asp:Button ID="ColRemoveBtn" runat="server" Text="Remove Column" OnClick="ColRemoveBtn_Click" />
<telerik:RadGrid ID="RadGrid1" runat="server" AutoGenerateColumns="false" DataSourceID="SqlDataSource1" AllowPaging="true" AllowSorting="true">
    <MasterTableView DataKeyNames="OrderID">
        <Columns>
            <telerik:GridBoundColumn UniqueName="OrderID" DataField="OrderID" HeaderText="OrderID" />
            <telerik:GridBoundColumn DataField="ShipCity" HeaderText="ShipCity" UniqueName="ShipCity" />
        </Columns>
    </MasterTableView>
</telerik:RadGrid>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:Northwind_newConnectionString3 %>"
    SelectCommand="SELECT  * FROM [Orders]"></asp:SqlDataSource>

C#:

protected void ColCreateBtn_Click(object sender, EventArgs e)
{
    string value = colTxtBox.Text;
    GridBoundColumn boundColumn;
    boundColumn = new GridBoundColumn();
    RadGrid1.MasterTableView.Columns.Add(boundColumn);
    boundColumn.DataField = value;
    boundColumn.HeaderText = value;
    boundColumn.UniqueName = value;
    RadGrid1.Rebind();
}
protected void ColRemoveBtn_Click(object sender, EventArgs e)
{
    string value = colTxtBox.Text;
    RadGrid1.MasterTableView.GetColumn(value).Visible = false;
}

Thanks,
Shinu

[Kostadin]

Hi Simon,

I would recommend you to examine the following help article which describes how to change the grid structure on postback.

Regards,
Kostadin
Telerik

[Simon]

Hi ,
Thanks for help.
The only thing i cant understand is how to access template item controls that was created programmaticly 
for example:
I have created item tepmplate with RADTEXTBOX,and put it to culumns

Dim  tc = New GridTemplateColumn
 tc.ItemTemplate = New MyTemplateAmount(c.ColumnName)
 gridData.MasterTableView.Columns.Add(tc)
 tc.HeaderText = "MINIMUM"
 tc.DataField = c.ColumnName
 tc.UniqueName = c.ColumnName

the name of RadTextbox inside the MyTemplateAmount is txt+c.ColumnName

On client side i changing the data inside RADTEXTBOX,next step i press button(postback) ,run on items:
For Each item As GridDataItem In gridData.MasterTableView.Items
but I cant access RADTEXTBOX,it doesnt exists in Items:

Dim text As RadTextBox = item(c.UniqueName).FindControl("txtMINIMUM")

Please help

[Shinu]

Hi Simon,

You are not able to get the RadTextBox value because its not being saved to view state when created on the button click. Column templates must be added in the Page_Init event handler, so that the template controls can be added to the ViewState. You may try a similar approach to create template column and access values on button click.

ASPX:

<asp:Button ID="Button2" runat="server" Text="Create Column" OnClick="Button2_Click" OnClientClick="SetSource(this.id)" />
<asp:PlaceHolder ID="PlaceHolder1" runat="server"></asp:PlaceHolder>
<asp:Button ID="Button1" runat="server" Text="Get Values" OnClick="Button1_Click" />
<asp:HiddenField ID="CustomHiddenField" runat="server" />

C#:

Private grid As RadGrid
Protected Sub Page_Init(sender As Object, e As EventArgs)
    grid = New RadGrid()
    grid.AutoGenerateColumns = False
    grid.DataSourceID = "SqlDataSource1"
    grid.AllowPaging = True
    grid.PageSize = 10
    grid.Skin = "Outlook"
    Dim templateColumn As New GridTemplateColumn()
    If IsPostBack Then
        Dim ControlID As String = String.Empty
        If Not [String].IsNullOrEmpty(Request.Form(CustomHiddenField.UniqueID)) Then
            ControlID = Request.Form(CustomHiddenField.UniqueID)
            Dim ColumnName As String = "ShipCity"
            templateColumn.ItemTemplate = New MyTemplate(ColumnName)
            templateColumn.HeaderText = ColumnName
            templateColumn.UniqueName = ColumnName
            templateColumn.DataField = ColumnName
        End If
    End If
    grid.MasterTableView.Columns.Add(templateColumn)
    PlaceHolder1.Controls.Add(grid)
End Sub
Private Class MyTemplate
    Implements ITemplate

    Protected textBox As RadTextBox
    Private colname As String
    Public Sub New(cName As String)
        colname = cName
    End Sub
    Public Sub InstantiateIn(container As System.Web.UI.Control)
        textBox = New RadTextBox()
        textBox.ID = Convert.ToString("txt") & colname
        container.Controls.Add(textBox)
    End Sub
End Class
Protected Sub Button1_Click(sender As Object, e As EventArgs)
    For Each items As GridDataItem In grid.MasterTableView.Items
        Dim txt As RadTextBox = DirectCast(items.FindControl("txtShipCity"), RadTextBox)
    Next
End Sub
Protected Sub Button2_Click(sender As Object, e As EventArgs)
    grid.Rebind()
End Sub

JS:

<script type="text/javascript">
 function SetSource(SourceID) {
     var hidSourceID =
     document.getElementById("<%=CustomHiddenField.ClientID%>");
     hidSourceID.value = SourceID;
   }
</script>

Thanks,
Shinu