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POCannot sort gridview in des order, neither can sort on another column?
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I have this grid view, it has 2 problems. <ol> <li>if I sort it by clicking on a column, and then I click again, its not sorted in des order.</li> <li>If once I sort with a <code>col A</code> and then click on any other column its not sorted again? <pre><code> <asp:GridView ID="grdReport" runat="server" AutoGenerateColumns="False" DataKeyNames="CustCode" ShowFooter="True" EmptyDataText="No record found" PageSize="50" CssClass="mGrid" onrowdatabound="grdReport_RowDataBound" AllowSorting="True" onsorting="grdReport_Sorting"> <Columns> <asp:TemplateField HeaderText="Select"> <ItemTemplate> <asp:CheckBox ID="chkSelect" runat="server"/> </ItemTemplate> </asp:TemplateField> <asp:TemplateField Visible="false"> <ItemTemplate> <asp:Label ID="lblCustCodes" runat="server" Text='<%# Eval("CustCode") %>' CssClass="grdCustName"></asp:Label> </ItemTemplate> </asp:TemplateField> <asp:TemplateField HeaderText="Customer" SortExpression="Customer"> <ItemTemplate> <asp:HyperLink Target="_blank" Text='<%# Eval("CustomerName") %>' runat="server" ID="hplNavigate"> </asp:HyperLink> </ItemTemplate> </asp:TemplateField> <asp:BoundField DataField="QTY" HeaderText="Booked Qty" HeaderStyle-HorizontalAlign="Right" ItemStyle-HorizontalAlign="Right" SortExpression="QTY"> <FooterStyle HorizontalAlign="Right" /> <ItemStyle HorizontalAlign="Right"></ItemStyle> </asp:BoundField> <asp:BoundField DataField="Volume" HeaderText="Booked Amt" HeaderStyle-HorizontalAlign="Right" ItemStyle-HorizontalAlign="Right" SortExpression="Volume"> <FooterStyle HorizontalAlign="Right" /> <ItemStyle HorizontalAlign="Right"></ItemStyle> </asp:BoundField> </asp:BoundField> <asp:BoundField DataField="FirstBill" HeaderText="First Bill" HeaderStyle-HorizontalAlign="left" ItemStyle-HorizontalAlign="left" SortExpression="FirstBill"> <FooterStyle HorizontalAlign="Left" /> <ItemStyle HorizontalAlign="Left"></ItemStyle> </asp:BoundField> </Columns> <FooterStyle BackColor="Aqua" Font-Bold="true" ForeColor="BlueViolet"/> </code></pre> </li> </ol> The code behind for sorting is <pre><code> switch (e.SortExpression) { case "Customer": if (e.SortDirection == SortDirection.Ascending) { var result = from table in Ob.DataTableOther.AsEnumerable() orderby table.Field<string>("CustomerName") select table; var dv = result.AsDataView(); grdReport.DataSource = dv; grdReport.DataBind(); } else { var result = from table in Ob.DataTableOther.AsEnumerable() orderby table.Field<string>("CustomerName") descending select table; var dv = result.AsDataView(); grdReport.DataSource = dv; grdReport.DataBind(); } break; case "QTY": if (e.SortDirection == SortDirection.Ascending) { var result = from table in Ob.DataTableOther.AsEnumerable() orderby table.Field<int>("Qty") select table; var dv = result.AsDataView(); grdReport.DataSource = dv; grdReport.DataBind(); } else { var result = from table in Ob.DataTableOther.AsEnumerable() orderby table.Field<int>("Qty") descending select table; var dv = result.AsDataView(); grdReport.DataSource = dv; grdReport.DataBind(); } break; case "Volume": if (e.SortDirection == SortDirection.Ascending) { var result = from table in Ob.DataTableOther.AsEnumerable() orderby table.Field<float>("Volume") select table; var dv = result.AsDataView(); grdReport.DataSource = dv; grdReport.DataBind(); } else { var result = from table in Ob.DataTableOther.AsEnumerable() orderby table.Field<float>("Volume") descending select table; var dv = result.AsDataView(); grdReport.DataSource = dv; grdReport.DataBind(); } break; case "FirstBill": if (e.SortDirection == SortDirection.Ascending) { var result = from table in Ob.DataTableOther.AsEnumerable() orderby table.Field<DateTime>("FirstBill") select table; var dv = result.AsDataView(); grdReport.DataSource = dv; grdReport.DataBind(); } else { var result = from table in Ob.DataTableOther.AsEnumerable() orderby table.Field<DateTime>("FirstBill") descending select table; var dv = result.AsDataView(); grdReport.DataSource = dv; grdReport.DataBind(); } break; default: break; } </code></pre> And the row data bound event is <pre><code> protected void grdReport_RowDataBound(object sender, GridViewRowEventArgs e) { # region try try { if (e.Row.RowType == DataControlRowType.DataRow && Ob.DatasetMain.Tables[0].Rows.Count != 0) { if ((Ob.FromDate != null || Ob.FromDate != "") && (Ob.UptoDate != null || Ob.UptoDate != "")) { ((HyperLink)e.Row.Cells[2].FindControl("hplNavigate")).NavigateUrl = String.Format("~//Reports/BookingByCustomerReport.aspx?BC={0},{1},{2},{3}", Ob.DatasetMain.Tables[0].Rows[Ob.Counter][0], Ob.FromDate, Ob.UptoDate, radReportFrom.Checked); Ob.Counter++; } if (hdnFromCustomer.Value == "true") { ((CheckBox)e.Row.Cells[0].FindControl("chkSelect")).Checked = true; } } if (e.Row.RowType == DataControlRowType.Footer) { if (Ob.DatasetOther.Tables[0].Rows.Count != 0) { e.Row.Cells[2].Text = "Total"; e.Row.Cells[3].Text = Ob.DatasetOther.Tables[0].Rows[Ob.DatasetOther.Tables[0].Rows.Count - 1][2].ToString(); e.Row.Cells[4].Text = Ob.DatasetOther.Tables[0].Rows[Ob.DatasetOther.Tables[0].Rows.Count - 1][3].ToString(); e.Row.Cells[5].Text = Ob.DatasetOther.Tables[0].Rows[Ob.DatasetOther.Tables[0].Rows.Count - 1][4].ToString(); e.Row.Cells[6].Text = Ob.DatasetOther.Tables[0].Rows[Ob.DatasetOther.Tables[0].Rows.Count - 1][5].ToString(); } } } # endregion catch (Exception ex) { } } </code></pre> To again list out problem <ol> <li>I cannot sort by des when I click again</li> <li>If I sort out by say, customer name, and then click on <code>qty</code> or any other I get <code>Specified cast is not valid.</code> Means, I cannot sort out by clicking any other column once I sorted by any particular column. </li> </ol> Can anyone help me figure out problem?
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<c#><asp.net><sorting><gridview>
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Cannot sort gridview in des order, neither can sort on another column?
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.