i am trying with both gridboundColumn and with gridDatetime column but its is not working for any of ane.below is my code for sorting .
Please let me know if i had done any mistake in this ASAP.


<telerik:RadGrid ID="gvMessages" runat="server" AllowSorting="true" ShowGroupPanel="true"
                                                        PageSize="20" AllowPaging="True" AutoGenerateColumns="False" GridLines="Horizontal"
                                                        OnItemDataBound="gvMessages_ItemDataBound" OnNeedDataSource="gvMessages_NeedDataSource"
                                                        OnGroupsChanging="gvMessages_GroupsChanging" OnItemCreated="gvMessages_ItemCreated"
                                                        OnItemCommand="gvMessages_ItemCommand" AllowMultiRowSelection="true" OnRowDrop="gvMessages_RowDrop">
                                                        <HeaderContextMenu EnableAutoScroll="True" />
                                                        <MasterTableView Width="100%" CommandItemDisplay="Top" DataKeyNames="MessageID,PhaseID"
                                                            ClientDataKeyNames="MessageID">
                                                            <SortExpressions>
                                                                <telerik:GridSortExpression FieldName="DateCreated" SortOrder="Descending" />
                                                                <telerik:GridSortExpression FieldName="DateCreated" SortOrder="Descending" />
                                                            </SortExpressions>
                                                            <Columns>
                                                                <telerik:GridTemplateColumn AllowFiltering="false" UniqueName="MessageID" DataField="MessageId">
                                                                    <HeaderStyle Width="20px" />
                                                                    <ItemTemplate>
                                                                        <asp:Image ID="imgFiles" runat="server" ImageUrl="~/Images/attachment-icon.png" Height="18px"
                                                                            Width="17px" />
                                                                    </ItemTemplate>
                                                                </telerik:GridTemplateColumn>
                                                                <telerik:GridBoundColumn SortExpression="Email" AutoPostBackOnFilter="true" HeaderText="From"
                                                                    HeaderButtonType="TextButton" DataField="Email" UniqueName="Email">
                                                                    <HeaderStyle Width="150px" />
                                                                </telerik:GridBoundColumn>
                                                                <telerik:GridBoundColumn SortExpression="MessageSubject" AutoPostBackOnFilter="true"
                                                                    HeaderText="Subject" HeaderButtonType="TextButton" DataField="MessageSubject"
                                                                    UniqueName="MessageSubject">
                                                                    <HeaderStyle Width="200px" />
                                                                </telerik:GridBoundColumn>
                                                                <telerik:GridBoundColumn DataFormatString="{0:MM/dd/yyyy 00:00:00}" SortExpression="DateCreated"
                                                                    AutoPostBackOnFilter="true"  AllowSorting=true DataType="System.TimeSpan" HeaderText="Date" HeaderButtonType="TextButton"
                                                                    DataField="DateCreated" UniqueName="DateCreated">
                                                                    <HeaderStyle Width="200px" />
                                                                </telerik:GridBoundColumn>
                                                                <telerik:GridBoundColumn SortExpression="SenderName" AutoPostBackOnFilter="true"
                                                                    HeaderText="Created By" HeaderButtonType="TextButton" DataField="SenderName"
                                                                    UniqueName="SenderName">
                                                                    <HeaderStyle Width="200px" />
                                                                </telerik:GridBoundColumn>
                                                                <telerik:GridTemplateColumn AllowFiltering="false" HeaderText="Phase Name" UniqueName="PhaseID"
                                                                    DataField="PhaseID">
                                                                    <HeaderStyle Width="200px" />
                                                                    <ItemTemplate>
                                                                        <asp:Label ID="lblPhase" runat="server" Text='<%#Eval("TagName").ToString() %>'></asp:Label>
                                                                    </ItemTemplate>
                                                                </telerik:GridTemplateColumn>
                                                            </Columns>
                                                        </MasterTableView>
                                                        <ClientSettings>
                                                            <ClientEvents OnRowContextMenu="RowContextMenu1"></ClientEvents>
                                                            <Selecting AllowRowSelect="true" />
                                                        </ClientSettings>
                                                        <ClientSettings AllowDragToGroup="True" AllowRowsDragDrop="true" ReorderColumnsOnClient="True"
                                                            AllowColumnHide="True" AllowRowHide="True" AllowColumnsReorder="True">
                                                            <Resizing EnableRealTimeResize="True" ResizeGridOnColumnResize="True" AllowColumnResize="True"
                                                                ClipCellContentOnResize="False"></Resizing>
                                                            <ClientEvents OnRowDblClick="ShowMessage" />
                                                            <Selecting AllowRowSelect="True" EnableDragToSelectRows="false" />
                                                            <Selecting AllowRowSelect="True" />
                                                            <ClientEvents OnRowDropping="onRowDropping" />
                                                        </ClientSettings>
                                                        <GroupingSettings CaseSensitive="false" />
                                                    </telerik:RadGrid>

Thanks.

Hello Mandeep,

Could you specify what exactly do you mean by "not working" - does it throw an error or it does not sort properly?

Also, could you please share what are the results if you:
-Remove the initial sort and try to sort the column on header click? Does it sort normally this time?
-If not, what happens if you convert the TimeSpan data to string? I know that it will now be sorting alphabetically but does it sort without problems?

The answers to these questions will help us narrow down the set of possible reasons for the erroneous behavior.

All the best,
Tsvetina
the Telerik team

Hi

I'm working on a similar issue.
I want to get my radgrid sorted on the 'Date' field in a descending order when the grid loads for the first time.
The grid is bound to a webmethod.
Can you guide me?

Thanks,
Shuaib

Hello,

Try the following code.
C#:

-Shinu.

Hi Shuaib,

You can achieve this declaratively, for example:

You can also add it programmatically, similarly to what Shinu showed but without the Rebind() on Page_Load, as this is not recommended practice.

More information is available here.

Regards,
Tsvetina
the Telerik team

Hi Tsvetina

Thanks for your reply.
But I need to click the header for the grid to get sorted when I add a sort expression that way.
I want it to get sorted the first time it loads and shows up instead of clicking it to sort.

Thanks,
Shuaib

Hi Shuaib,

When using Shinu's code on initial Page_Load, the user does not need to do anything to get the sorting applied. You can see this in the following demo:
http://demos.telerik.com/aspnet-ajax/grid/examples/generalfeatures/sorting/defaultcs.aspx

Greetings,
Tsvetina
the Telerik team

Hi

Shinu - I know this is an old post but wanted to compliment you on your default sort code in Page_Load() - it works great!