Forms Data Controls :: How To Sort Grid On Two Column
May 12, 2010In gridview I am able to sort on 1 column as mentioned below, I want to add one more column in sorting, what is the best way to do this,
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static Int32 cntsortSecurityID = 0; // declare var to hold 0 or 1 // what is this, I dont understand why. what is the meaning of zero or One in this case . Oh yeas, the code is working for me, but I need to understand the concept behind it.
if (e.CommandName == "sortSecurityID")
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dv.Sort = "SecurityID asc";
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<asp:DataGrid ID="dtgCustomerSearch" runat="server" AllowSorting="true">
<Columns>
<asp:BoundColumn HeaderText="CustomerID" DataField="CustomerID" />
<asp:BoundColumn HeaderText="First Name" DataField="FirstName"
SortExpression="FirstName" />
<asp:BoundColumn HeaderText="Last Name" DataField="LastName"
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<asp:BoundColumn HeaderText="Phone No." DataField="Phone" />
<asp:BoundColumn HeaderText="Email ID" DataField="EmailID" />
</Columns>
</asp:DataGrid>
On Page_load I have wrote: this.dtgCustomerSearch.SortCommand += new DataGridSortCommandEventHandler(dtgCustomerSearch_SortCommand);
private void dtgCustomerSearch_SortCommand(object source, System.Web.UI.WebControls.DataGridSortCommandEventArgs e)
{
SortExpression = e.SortExpression;
BindTheGrid();
}
string SortExpression
{
set
{
if (ViewState["SortExp"] == null || value != ViewState["SortExp"].ToString())
{
ViewState["SortExp"] = value;
}
else
{
ViewState["SortExp"] = value + " DESC";
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}
get
{
return ViewState["SortExp"] == null ? string.Empty : ViewState["SortExp"].ToString();
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}
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<asp:DropDownList runat="server" id="DropDownList1" Width="90px">
<asp:ListItem Value="item_num">Item #</asp:ListItem>
<asp:ListItem Value="lot_num">Lot #</asp:ListItem>
<asp:ListItem Value="production_code">Production Code
</asp:ListItem>
<asp:ListItem Value="batchcode">Batch Code</asp:ListItem>
<asp:ListItem Value="inbound_no">Inbound #</asp:ListItem>
<asp:ListItem Value="recv_date">Received Date</asp:ListItem>
<asp:ListItem Value="location">Location</asp:ListItem>
<asp:ListItem Value="category">Category</asp:ListItem>
</asp:DropDownList>
<asp:DropDownList runat="server" id="DropDownList2" Width="160px">
<asp:ListItem Value="=">is equal to</asp:ListItem>
<asp:ListItem Value="<=">is less than or equal to
</asp:ListItem>
<asp:ListItem Value=">=">is greater than or equal to
</asp:ListItem>
<asp:ListItem Value="<>">is not equal to</asp:ListItem>
<asp:ListItem Value="begins with">Begins With</asp:ListItem>
<asp:ListItem Value="Like">Ends With</asp:ListItem>
</asp:DropDownList>
<asp:TextBox runat="server" id="TextBox1" Width="150px">
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<asp:Button runat="server" Text="Go" id="Button8" BackColor="Lime" />
<asp:Button runat="server" Text="Clear Filter" id="Button9" /><br />
<input name="Checkbox1" type="checkbox" /><label id="Label5">
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Group by Fields: <input name="Checkbox2" type="checkbox" />
Item/Lot
<input name="Checkbox3" type="checkbox" /> Production Code
<input name="Checkbox4" type="checkbox" /> Batch Code</label><label id="Label4"></label><br />
<hr />
<asp:GridView runat="server" id="GridView1" AutoGenerateColumns="False" DataSourceID="SqlDataSource1" Font-Size="Small" BorderStyle="None" BackColor="White" GridLines="Vertical" BorderColor="#999999" BorderWidth="1px" CellPadding="3" Font-Underline="False"
AllowSorting="True" AllowPaging="True" PageSize="20">
<RowStyle BackColor="#EEEEEE" ForeColor="Black" />
<Columns>
<asp:boundfield DataField="STATUS" HeaderText="Status" SortExpression="STATUS">
</asp:boundfield>
<asp:boundfield DataField="ITEM_NUM" HeaderText="Item #" SortExpression="ITEM_NUM">
</asp:boundfield>
<asp:boundfield DataField="LOT_NUM" HeaderText="Lot #" SortExpression="LOT_NUM">
</asp:boundfield>
<asp:boundfield DataField="LOT_EXT" HeaderText="Lot Ext" SortExpression="LOT_EXT">
</asp:boundfield>
<asp:boundfield DataField="RECV_DATE" HeaderText="Recv Dt" SortExpression="RECV_DATE">
</asp:boundfield>
<asp:boundfield DataField="PRODUCTION_CODE" HeaderText="Prod Code" SortExpression="PRODUCTION_CODE">
</asp:boundfield>
<asp:boundfield DataField="QTY_ONHAND" DataFormatString="{0:NO}" HeaderText="OnHand" SortExpression="QTY_ONHAND">
</asp:boundfield>
<asp:boundfield DataField="QTY_RESERV" HeaderText="Reserv" SortExpression="QTY_RESERV">
</asp:boundfield>
<asp:boundfield DataField="QTY_AVAIL" DataFormatString="{0:N}" HeaderText="Avail" SortExpression="QTY_AVAIL">
</asp:boundfield>
<asp:boundfield DataField="QTY_ADJUST" HeaderText="Adjust" SortExpression="QTY_ADJUST">
</asp:boundfield>
<asp:boundfield DataField="QTY_SHIP" HeaderText="Shipped" SortExpression="QTY_SHIP">
</asp:boundfield>
<asp:boundfield DataField="QTY_RECV" HeaderText="Recv" SortExpression="QTY_RECV">
</asp:boundfield>
<asp:boundfield DataField="PROD_DATE" HeaderText="Prod Date" SortExpression="PROD_DATE">
</asp:boundfield>
<asp:boundfield DataField="RELEASE_DATE" HeaderText="Release" SortExpression="RELEASE_DATE">
</asp:boundfield>
</Columns>
<FooterStyle BackColor="#CCCCCC" ForeColor="Black" />
<PagerStyle HorizontalAlign="Center" BackColor="#999999" ForeColor="Black" />
<SelectedRowStyle BackColor="#008A8C" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#000084" ForeColor="White" Font-Bold="True" />
<AlternatingRowStyle BackColor="#DCDCDC" />
</asp:GridView>
<asp:SqlDataSource runat="server" id="SqlDataSource1" ConnectionString="<%$ ConnectionStrings:RemoteRooster %>" SelectCommand="SELECT * FROM [INVENTRY] WHERE OWNER = 'CompanyName' AND QTY_ONHAND > '0'">
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<asp:GridView ID="gvInfos" runat="server"
CheckBoxEnabled = "true"
ShowEmptyTable = "true"
AutoGenerateColumns = "False"
CssClass = "gv_white"
DataKeyNames = "Id"
GridLines = "None"
Width = "100%"
AllowSorting = "true"
>
<Columns>
<asp:ButtonField CommandName="Select" DataTextField="Name" HeaderText="Name" />
<asp:BoundField DataField="Position" HeaderText="Position" />
<asp:BoundField DataField="StartDate" HeaderText="Start Date"
DataFormatString="{0:Y}" />
<asp:TemplateField HeaderText="End Date" SortExpression="EndDate">
<ItemTemplate>
<%# (((DateTime)Eval("EndDate")).Year == (DateTime.MaxValue.Year) || (DateTime)Eval("EndDate") == null) ? "Present" : ((DateTime)Eval("EndDate")).ToString("y")%>
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</asp:TemplateField>
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When I click a column heading, the GridView disappears and I have to click the Button to display the grid again. When I do, the grid is displayed in the order of the column I clicked.
I don't understand why the GridView is disappearing when I click a column header.
Does anyone know how to fix this so the GridView is sorted and displayed only by clicking the column header?
ASPX:
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Code behind:
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Here's my code:
<script type="text/javascript" language="javascript">
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}
</script>
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