Column Sorting, DateTime & Double

[Emma Rennie]

I am using RadGrid version 2009.3.1208.35. All code is below.

When I set the Date column as DataType="System.DateTime" it still does not seem to sort correctly. If i set the Column type to DateTime, ie "dt.Columns.Add("Date", typeof(DateTime));" it works. Is there any way to have correct sorting without having to do this?

    protected void gv_NeedDataSource(object source, GridNeedDataSourceEventArgs e)
    {
      DataTable dt = new DataTable();
      dt.Columns.Add("Date");
      dt.Columns.Add("Double");
      dt.Rows.Add(new object[] {"14/08/2009","1.1" });
      dt.Rows.Add(new object[] { "20/08/2009", "10.1" });
      dt.Rows.Add(new object[] { "10/09/2009", "2.1" });
      dt.Rows.Add(new object[] { "25/09/2008", "2.1" });
      dt.Rows.Add(new object[] { "25/11/2009", "2.1" });
      dt.Rows.Add(new object[] { "1/1/2009", "2.1" });

      rg.DataSource = dt;
    }

    <telerik:RadGrid ID="rg" runat="server" AutoGenerateColumns="false" OnNeedDataSource="gv_NeedDataSource"
      AllowSorting="true">
      <MasterTableView>
        <Columns>
          <telerik:GridBoundColumn DataType="System.DateTime" HeaderText="Date" DataField="Date"
            UniqueName="Date" DataFormatString="{0:MM/yyyy}">
          </telerik:GridBoundColumn>
          <telerik:GridBoundColumn DataType="System.Double" HeaderText="Double" DataField="Double"
            ItemStyle-HorizontalAlign="Right">
          </telerik:GridBoundColumn>
        </Columns>
      </MasterTableView>
    </telerik:RadGrid>

[Rosen]

Hi Nataliya,

Actually this is expected behavior due to the fact that you are supplying neither a DateTime or a Numeric but a string value, therefore it will be sorted as a string. Thus you should explicitly declare and supply the correct value types.

Regards,
Rosen
the Telerik team

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[whidbey boy]

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