If you set AllowPaging="true" or AllowSorting="true" on a GridView control without using a DataSourceControl DataSource (i.e. SqlDataSource, ObjectDataSource), you will run into the following errors:
When changing the page on the GridView control:
The GridView 'GridViewID' fired event PageIndexChanging which wasn't handled.
When clicking a column name to sort the column on the GridView control:
The GridView 'GridViewID' fired event Sorting which wasn't handled.
As a result of not setting the DataSourceID property of the GridView to a DataSourceControl DataSource, you have to add event handlers for sorting and paging.
<asp:GridView ID="gridView" OnPageIndexChanging="gridView_PageIndexChanging" OnSorting="gridView_Sorting" runat="server" />
private string ConvertSortDirectionToSql(SortDirection sortDireciton)
{
string m_SortDirection = String.Empty;
switch (sortDirection)
{
case SortDirection.Ascending:
m_SortDirection = "ASC";
break;
case SortDirection.Descending:
m_SortDirection = "DESC";
break;
}
return m_SortDirection
}
protected void gridView_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
gridView.PageIndex = e.NewPageIndex;
gridView.DataBind();
}
protected void gridView_Sorting(object sender, GridViewSortEventArgs e)
{
DataTable m_DataTable = gridView.DataSource as DataTable;
if (m_DataTable != null)
{
DataView m_DataView = new DataView(m_DataTable);
m_DataView.Sort = e.SortExpression + " " + ConvertSortDirectionToSql(e.SortDirection);
gridView.DataSource = m_DataView;
gridView.DataBind();
}
}