I have a RadGrid setup like this
<div id="Grid">
<telerik:RadGrid RenderMode="Lightweight" runat="server" ID="RadGrid1" AutoGenerateColumns="false" AllowPaging="true"
OnNeedDataSource="UserGrid_NeedDataSource" OnUpdateCommand="RadGrid1_UpdateCommand"
OnItemCreated="RadGrid1_ItemCreated" OnDeleteCommand="RadGrid1_DeleteCommand"
OnInsertCommand="RadGrid1_InsertCommand">
<MasterTableView DataKeyNames="UserID" CommandItemDisplay="Top" EditMode="EditForms">
<Columns>
<telerik:GridEditCommandColumn />
<telerik:GridBoundColumn DataField="UserID" HeaderText="User ID" ReadOnly="true"
ForceExtractValue="Always" ConvertEmptyStringToNull="true" />
<telerik:GridCheckBoxColumn DataField="Active" HeaderText="Active" SortExpression="Active" UniqueName="chkActive"></telerik:GridCheckBoxColumn>
<telerik:GridTemplateColumn HeaderText="Role">
<ItemTemplate>
<%#DataBinder.Eval(Container.DataItem, "Role")%>
</ItemTemplate>
<EditItemTemplate>
<asp:DropDownList runat="server" ID="ddlRoles">
<asp:ListItem Text ="Admin" Value ="Administrator"></asp:ListItem>
<asp:ListItem Text ="User" Value ="User"></asp:ListItem>
</asp:DropDownList>
</EditItemTemplate>
</telerik:GridTemplateColumn>
<telerik:GridBoundColumn DataField="FirstName" HeaderText="First Name" UniqueName="FirstName" />
<telerik:GridBoundColumn DataField="LastName" HeaderText="Last Name" UniqueName ="LastName"/>
<telerik:GridBoundColumn DataField="UserName" HeaderText="User Name" UniqueName="UserName" />
<telerik:GridBoundColumn DataField="EmailAddress" HeaderText="Email Address" UniqueName="Email" />
<telerik:GridButtonColumn ConfirmText="Delete this User?" ConfirmDialogType="RadWindow"
ConfirmTitle="Delete" ButtonType="FontIconButton" CommandName="Delete" />
</Columns>
<EditFormSettings InsertCaption="Add new item" CaptionFormatString="Edit User: {0}" CaptionDataField="FirstName">
<EditColumn FilterControlAltText="Filter EditCommandColumn column"></EditColumn>
</EditFormSettings>
</MasterTableView>
<PagerStyle Mode="NextPrevAndNumeric" />
</telerik:RadGrid>
</div>
I want to udpade or add new records using C# code behind. However I cannot get access to any of the controls. When thew code attemps to read the value of the value of the control, in this case a textbox, I get an error message stating {"Object reference not set to an instance of an object."} here is the code
protected void RadGrid1_UpdateCommand(object sender, GridCommandEventArgs e)
{
GridEditableItem editedItem = e.Item as GridEditableItem;
UserControl userControl = (UserControl)e.Item.FindControl(GridEditFormItem.EditFormUserControlID);
string strUserID = editedItem.OwnerTableView.DataKeyValues[editedItem.ItemIndex]["UserID"].ToString();
int intUserId = Convert.ToUInt16(strUserID);
using (ExpungeEntities db = new ExpungeEntities())
{
var Results = db.USERS_T_DATA.SingleOrDefault(i => i.UserID == intUserId);
if (Results == null)
{
RadGrid1.Controls.Add(new LiteralControl("Unable to locate that user for updating"));
e.Canceled = true;
return;
}
Results.FirstName = (userControl.FindControl("FirstName") as TextBox).Text;
}
}
Can you please tell me what the problem is?