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<%@ Page Language="C#" %>
<script runat="server">
void deptView_RowCreated(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.Header)
{
string imageUrl = (deptView.SortDirection==SortDirection.Ascending ?"Asc.gif" :"Desc.gif");
for(int i=0; i<deptView.Columns.Count; i++)
{
string columnExpression = deptView.Columns[i].SortExpression;
if (columnExpression != "" && columnExpression == deptView.SortExpression)
{
Image img = new Image();
img.ImageUrl =imageUrl;
e.Row.Cells[i].Controls.Add(img);
}
}
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Adding Indicators to display Sorting Direction</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView ID="deptView"
AllowSorting="true"
runat="server"
AutoGenerateColumns="false"
DataSourceID="deptSource"
OnRowCreated="deptView_RowCreated">
<Columns>
<asp:BoundField HeaderText="Department ID"
DataField="DepartmentID"
SortExpression="DepartmentID" />
<asp:BoundField HeaderText="Name" DataField="Name" SortExpression="Name" />
<asp:BoundField HeaderText="Group Name" DataField="GroupName" />
</Columns>
</asp:GridView>
<asp:SqlDataSource ID="deptSource"
Runat="server"
SelectCommandType="Text"
SelectCommand="Select DepartmentID, Name, GroupName, ModifiedDate from HumanResources.Department"
ConnectionString="<%$ConnectionStrings:AdventureWorks%>">
</asp:SqlDataSource>
</div>
</form>
</body>
</html>
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