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populate Dropdownlist in Formtemplate

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Grid

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

dingen asked on 05 Feb 2010, 11:56 AM

hi

I am trying to populate a dropdownlist(ddl2) based on a the selectedvalue of ddl1 ?

D

    
            Imports Telerik.Web.UI 
        
            Partial Class dropdowninformtemplate 
        
                Inherits System.Web.UI.Page 
        
                Protected Sub RadGrid1_ItemCreated(ByVal sender As Object, ByVal e As Telerik.Web.UI.GridItemEventArgs) Handles RadGrid1.ItemCreated 
        
                    If e.Item.ItemType = Telerik.Web.UI.GridItemType.EditFormItem And e.Item.IsInEditMode Then 
        
                        Dim item As GridEditFormItem 
        
                        item = e.Item 
        
                        Dim ddl As DropDownList = CType(item.FindControl("ddl1"), DropDownList) 
        
                        Dim cmb As RadComboBox = item.FindControl("cmb") 
        
                        AddHandler ddl.SelectedIndexChanged, AddressOf ddl1_SelectedIndexChanged 
        
                        ddl.DataSource = DataConnection.GetDataTable("select * from products") 
        
                        ddl.DataTextField = "productname" 
        
                        ddl.DataValueField = "productid" 
        
                        ddl.DataBind() 
        
                    End If 
        
                End Sub 
        
                Protected Sub ddl1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) 
        
                    'populate ddl2 
        
                End Sub 
        
                Protected Sub RadGrid1_ItemCommand(ByVal source As Object, ByVal e As Telerik.Web.UI.GridCommandEventArgs) Handles RadGrid1.ItemCommand 
        
                    If e.Item.IsInEditMode Then 
        
                        Dim item As GridEditFormItem 
        
                        item = CType(e.Item, GridEditFormItem) 
        
                        Dim ddl2 As DropDownList = item.FindControl("ddl2") 
        
                    End If 
        
                End Sub 
        
                Protected Sub RadGrid1_NeedDataSource(ByVal source As Object, ByVal e As Telerik.Web.UI.GridNeedDataSourceEventArgs) Handles RadGrid1.NeedDataSource 
        
                    RadGrid1.DataSource = DataConnection.GetDataTable("select * from customers") 
        
                End Sub 
        
            End Class

put the DataConnection class in the App_Code folder:

    
            Imports Microsoft.VisualBasic 
        
            Imports System.Data 
        
            Imports System.Data.SqlClient 
        
            Public Class DataConnection 
        
                Public Shared Function GetDataTable(ByVal query As String) As DataTable 
        
                    Dim ConnString As String = ConfigurationManager.ConnectionStrings("NorthwindConnectionString").ConnectionString 
        
                    Dim conn As SqlConnection = New SqlConnection(ConnString) 
        
                    Dim adapter As SqlDataAdapter = New SqlDataAdapter 
        
                    adapter.SelectCommand = New SqlCommand(query, conn) 
        
                    Dim table1 As New DataTable 
        
                    conn.Open() 
        
                    Try 
        
                        adapter.Fill(table1) 
        
                    Finally 
        
                        conn.Close() 
        
                    End Try 
        
                    Return table1 
        
                End Function 
        
            End Class

    
            <%@ Page Language="VB" AutoEventWireup="false" CodeFile="dropdowninformtemplate.aspx.vb" 
        
                Inherits="dropdowninformtemplate" %> 
        
            <%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %> 
        
            <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
        
            <html xmlns="http://www.w3.org/1999/xhtml"> 
        
            <head runat="server"> 
        
                <title></title> 
        
            </head> 
        
            <body> 
        
                <form id="form1" runat="server"> 
        
                <div> 
        
                    <telerik:RadScriptManager ID="RadScriptManager1" runat="server"> 
        
                    </telerik:RadScriptManager> 
        
                    <telerik:RadGrid ID="RadGrid1" runat="server"> 
        
                        <MasterTableView EditMode="EditForms"> 
        
                            <Columns> 
        
                                <telerik:GridEditCommandColumn> 
        
                                </telerik:GridEditCommandColumn> 
        
                            </Columns> 
        
                            <EditFormSettings EditFormType="Template"> 
        
                                <FormTemplate> 
        
                                    <asp:DropDownList ID="ddl1" runat="server" AutoPostBack="true"> 
        
                                    </asp:DropDownList> 
        
                                    <asp:DropDownList ID="ddl2" runat="server"> 
        
                                    </asp:DropDownList> 
        
                                </FormTemplate> 
        
                            </EditFormSettings> 
        
                        </MasterTableView> 
        
                    </telerik:RadGrid> 
        
                </div> 
        
                </form> 
        
            </body> 
        
            </html>

populate Dropdownlist in Formtemplate

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