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RowDataBound fill dropdownlist

pascalmartin
pascalmartin asked
on
I can't bind my dropdownlist when my gridview goes on edit mode. I need help here.

Here below my code:

<asp:TemplateField HeaderText = "Driver" >
<ItemTemplate>
<asp:DropDownList id="ddlDriver" runat="server" AutoPostBack="true" OnTextChanged="DriverTextChanged" />
</ItemTemplate>
<EditItemTemplate>
<%--<asp:DropDownList ID="ddlReplace" runat="server"  />
--%></EditItemTemplate>
</asp:TemplateField>

In the code behind:

Sub GridDelivery_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
        If GridDelivery.EditIndex = -1 Then 'GRIDVIEW NOT IN EDIT MODE
            If (e.Row.RowType = DataControlRowType.DataRow) Then
                Dim ddlDriver As DropDownList = CType(e.Row.FindControl("ddlDriver"), DropDownList)
                Dim myConn As SqlConnection = New SqlConnection(ConfigurationManager.ConnectionStrings("LocalSqlServer").ConnectionString)
                Dim myCommand1 As SqlCommand = New SqlCommand("GetDriver", myConn)
                myCommand1.CommandText = "GetDriver"
                myCommand1.CommandType = CommandType.StoredProcedure
                Using myConn
                    myConn.Open()
                    Dim DRDriver As SqlDataReader = myCommand1.ExecuteReader(CommandBehavior.CloseConnection)

                    ddlDriver.DataSource = DRDriver
                    ddlDriver.DataValueField = "PlateNB"
                    ddlDriver.DataTextField = "DriverID"
                    ddlDriver.DataBind()
                    ddlDriver.Items.Insert(0, "[Select a Driver]")
                End Using
            End If
        End If

        If GridDelivery.EditIndex = 1 Then 'GRIDVIEW NOT IN EDIT MODE
            If (e.Row.RowType = DataControlRowType.DataRow) Then
                Dim ddlDriver1 As DropDownList = CType(e.Row.FindControl("ddlReplace"), DropDownList)
                Dim myConn2 As SqlConnection = New SqlConnection(ConfigurationManager.ConnectionStrings("LocalSqlServer").ConnectionString)
                Dim myCommand2 As SqlCommand = New SqlCommand("GetDriver", myConn2)
                myCommand2.CommandText = "GetDriver"
                myCommand2.CommandType = CommandType.StoredProcedure
                Using myConn2
                    myConn2.Open()
                    Dim DRDriver1 As SqlDataReader = myCommand2.ExecuteReader(CommandBehavior.CloseConnection)
                    ddlDriver1.DataSource = DRDriver1
                    ddlDriver1.DataValueField = "PlateNB"
                    ddlDriver1.DataTextField = "DriverID"
                    ddlDriver1.DataBind()
                    ddlDriver1.Items.Insert(0, "[Select a Driver]")
                End Using
            End If
        End If
    End Sub
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Top Expert 2011
Commented:
Hi

You didn't show the code for the update statement but anyhow, try this.

On the markup:

        <asp:TemplateField HeaderText = "Driver">
        <ItemTemplate>
          <asp:Label ID="lblDriver" runat="server" Text='<%# Eval("PlateNB")%>'></asp:Label>
        </ItemTemplate>
        <EditItemTemplate>
                <asp:Label ID="lblDriver" runat="server" Text='<%# Eval("DriverID")%>' Visible = "false"></asp:Label>
        <asp:DropDownList ID = "ddlDriver" runat = "server">
        </asp:DropDownList>
        </EditItemTemplate>

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'Then your rowDataBound sub

    Sub GridDelivery_RowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
            If e.Row.RowType = DataControlRowType.DataRow AndAlso GridDelivery.EditIndex = e.Row.RowIndex Then
                     Dim ddlDriver As DropDownList = CType(e.Row.FindControl("ddlDriver"), DropDownList)
                     Dim myConn As SqlConnection = New SqlConnection(ConfigurationManager.ConnectionStrings("LocalSqlServer").ConnectionString)
                     Dim myCommand1 As SqlCommand = New SqlCommand("GetDriver", myConn)
                     myCommand1.CommandText = "GetDriver"
                     myCommand1.CommandType = CommandType.StoredProcedure
                     Using myConn
                         myConn.Open()
                         Dim DRDriver As SqlDataReader = myCommand1.ExecuteReader(CommandBehavior.CloseConnection)
    
                         ddlDriver.DataSource = DRDriver
                         ddlDriver.DataValueField = "PlateNB"
                         ddlDriver.DataTextField = "DriverID"
                         ddlDriver.DataBind()
                         'ddlDriver.Items.Insert(0, "[Select a Driver]")
                         ddlDriver.Items.FindByValue(TryCast(e.Row.FindControl("lblDriver"), Label).Text).Selected = True
                     End Using
                 End If

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Now, depending on how your UPDATE statement is written, this should work or get you very close to what you are after.
Kaushal AroraTechnical Analyst

Commented:
Dear pascalmartin,

Kindly try this also if not resolved yet. Change your code from 

 If GridDelivery.EditIndex = 1 Then 'GRIDVIEW NOT IN EDIT MODE

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to  

If GridDelivery.EditIndex != -1 Then 'GRIDVIEW NOT IN EDIT MODE

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Hope this helps you.

Regards,
Kaushal Arora
pascalmartin

Author

Commented:
Excellent!