Hello there,

I changed the way we're showing it, so the problem has solved itself.

If I need to check this again, I'll reopen the case.

Thanks for your response.

Hello Matthias,

Were you able to reproduce this issue with the sample that Olga provided?

I made some tests, its definitly the header template.

Here is the whole grid:
            <ig:WebDataGrid ID="dgrIndRoleAttributes" runat="server" Height="350px" Width="100%"
                Visible="false" ShowHeader="true" AutoGenerateColumns="False" PageSize="4" CellPadding="0"
                CssClass="aspGrid" EnableViewState="true">
                
                <Behaviors>
                    <ig:EditingCore>
                        <Behaviors>
                            <ig:RowAdding>
                                <AddNewRowClientEvents />
                                <EditModeActions EnableF2="false" />
                            </ig:RowAdding>
                        </Behaviors>
                    </ig:EditingCore>
                </Behaviors>
                <Columns>
                    <ig:BoundDataField Hidden="true" Key="bdIndRoleAttributeId" DataFieldName="IR_ATTR_ID">
                    </ig:BoundDataField>
                    <ig:TemplateDataField Header-Text="Description" Key="IndRoleAttribDesc" Width="50%">
                        <ItemTemplate>
                            <stgwc:DropDown runat="server" ID="ddlIndRoleAttribDescr">
                            </stgwc:DropDown>
                        </ItemTemplate>
                    </ig:TemplateDataField>
                    <ig:TemplateDataField Header-Text="Value" Key="IndRoleAttribVal" Width="50%">
                        <ItemTemplate>
                            <stgwc:TextEdit runat="server" ID="txtIndRoleAttribValue">
                            </stgwc:TextEdit>
                        </ItemTemplate>
                    </ig:TemplateDataField>
                    <ig:TemplateDataField Header-Text="Action" Key="IndRoleAttribAction" Width="50px">
                        <HeaderTemplate>                            
<%--                            <stgwc:ImageLinkButton runat="server" ID="btnCreateNewAttribute" ImageUrl="~/Images/base/Icons/16x16/add2.png"
                                ToolTip="Add new Attribute" CommandName="Create" />

                            <stgwc:ImageLinkButton runat="server" ID="btnSaveAllAttributes" ImageUrl="~/Images/base/Icons/16x16/disk_green.png"
                                ToolTip="Save all Attributes" CommandName="Save" />

                            <stgwc:ImageLinkButton runat="server" ID="btnCancelChanges" ImageUrl="~/Images/base/Icons/16x16/undo.png"
                                CommandName="Cancel" ToolTip="Discard changes" />--%>

                        </HeaderTemplate>
                        <ItemTemplate>
                            <stgwc:ImageLinkButton runat="server" ID="btnDeleteAttribute" ImageUrl="~/Images/base/Icons/16x16/delete2.png"
                                ToolTip="Delete this Attribute" CommandName="Delete" CommandArgument='<%# Bind("IR_ATTR_ID") %>' />
                        </ItemTemplate>
                    </ig:TemplateDataField>
                </Columns>
            </ig:WebDataGrid>

As you can see, I commented the buttons out, just to have an empty header template field.

If I remove this too, it works proper.

I guess it has something to do with the method I reload the data at page_load:

        private void LoadIndRoleAttributes()
        {
            if (Session[Constants.Session.IndRoleId.ToString()] == null)
                return;

            long indRoleId = Convert.ToInt64(Session[Constants.Session.IndRoleId.ToString()]);

            if (Session[TMP] == null)
            {
                FastApplication.CallFacade<IIndRole>(
                    facade => { Session[TMP] = facade.GetIndRoleAttributes(r => r.INDROLE_ID == indRoleId); });
            }

            dgrIndRoleAttributes.ClearDataSource();
            dgrIndRoleAttributes.Rows.Clear();
            dgrIndRoleAttributes.DataSource = (Session[TMP] as List<INDROLE_ATTRIBUTE>);
            dgrIndRoleAttributes.DataBind();
        }

So far I can't see anything special: I clear the datasource, I clear the rows, then I set the source and bind it.

Can you reproduce it? Is it a bug from the datagrid?

Hi Matthias,

You can add a css class with a display: none, setting and achieve the same thing. If you are not recreating the control on postback I would have to see your code to see why you are getting the error.

Thanks

Olga