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

Cannot Get Value from A GridBoundCoulmn

0 Answers 11 Views
This is a migrated thread and some comments may be shown as answers.
Top achievements
Rank 1
Perry asked on 19 Apr 2018, 02:26 PM

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"
                        <MasterTableView DataKeyNames="UserID" CommandItemDisplay="Top" EditMode="EditForms">
                                <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">
                                        <%#DataBinder.Eval(Container.DataItem, "Role")%>
                                  <asp:DropDownList runat="server" ID="ddlRoles">
                                      <asp:ListItem Text ="Admin" Value ="Administrator"></asp:ListItem>
                                      <asp:ListItem Text ="User" Value ="User"></asp:ListItem>
                                <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" />
                            <EditFormSettings InsertCaption="Add new item" CaptionFormatString="Edit User: {0}" CaptionDataField="FirstName">
                                 <EditColumn FilterControlAltText="Filter EditCommandColumn column"></EditColumn>
                        <PagerStyle Mode="NextPrevAndNumeric" />


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;
                Results.FirstName = (userControl.FindControl("FirstName") as TextBox).Text;

Can you please tell me what the problem is?


No answers yet. Maybe you can help?

Asked by
Top achievements
Rank 1
Share this question