📄 sort-find-datagrid.aspx
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<%@Page Language="C#"%>
<%@Import Namespace="System.Data" %>
<%@ Register TagPrefix="wrox" TagName="connect" Src="..\global\connect-strings.ascx" %>
<%@ Register TagPrefix="wrox" TagName="getdataview" Src="..\global\get-dataview-control.ascx" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html><head>
<title>Sorting Rows and Finding Data in a DataGrid Control</title>
<style type="text/css">
body, td {font-family:Tahoma,Arial,sans-serif; font-size:10pt}
input {font-family:Tahoma,Arial,sans-serif; font-size:8pt}
.heading {font-family:Tahoma,Arial,sans-serif; font-size:14pt; font-weight:bold}
.subhead {font-family:Tahoma,Arial,sans-serif; font-size:12pt; font-weight:bold; padding-bottom:5px}
.cite {font-family:Tahoma,Arial,sans-serif; font-size:8pt}
.rHead {font-family:Lucida Handwriting,Comic Sans MS,Tahoma,Arial;
font-size:14pt; font-weight:bold; padding:8px; color:green}
.rItem {font-family:Lucida Handwriting,Comic Sans MS,Tahoma,Arial,sans-serif;
font-size:10pt}
.rFoot {font-family:Tahoma,Arial; font-size:8pt; padding:8px; color:darkgray}
</style></head>
<body bgcolor="#ffffff">
<span class="heading">Sorting Rows and Finding Data in a DataGrid Control</span><hr />
<!--------------------------------------------------------------------------->
<%-- insert connection string script --%>
<wrox:connect id="ctlConnectStrings" runat="server" />
<%-- insert the control that creates the DataSet --%>
<wrox:getdataview id="ctlDataView" runat="server" />
<form runat="server">
Select only Titles containing the text:
<ASP:TextBox id="txtFindText" runat="server" />
<ASP:Button id="cmdFind" Text="Find" runat="server" /><p />
<ASP:DataGrid id="MyDataGrid" runat="server"
EnableViewState="False"
CellPadding="5"
GridLines="None"
HeaderStyle-BackColor="silver"
HeaderStyle-HorizontalAlign="center"
FooterStyle-BackColor="silver"
ShowFooter="True"
AllowSorting="True"
OnSortCommand="SortRows" />
</form>
<!--------------------------------------------------------------------------->
<script language="C#" runat="server">
string gstrSortOrder; // to hold the sort order
string gstrFindText; // to hold the filter expression
void Page_Load(Object sender, EventArgs e)
{
if (Page.IsPostBack)
{
// set the value to be used for the RowFilter on the DataView
gstrFindText = "Title LIKE '*" + txtFindText.Text + "*'";
}
else
{
// set the default values for the sort string and filter text box
gstrSortOrder = "ISBN";
txtFindText.Text = "ASP";
}
// recreate the data set and bind to the DataGrid control
BindDataGrid();
}
void SortRows(Object objSender, DataGridSortCommandEventArgs objArgs )
{
// runs when the column headings in the DataGrid are clicked
// get the sort expression (name of the column heading that was clicked)
gstrSortOrder = objArgs.SortExpression.ToString();
// recreate the data set and bind to the DataGrid control
BindDataGrid();
}
void BindDataGrid()
{
// get connection string from ..\global\connect-strings.ascx user control
string strConnect = ctlConnectStrings.OLEDBConnectionString;
// create a SQL statement to select some rows from the database
string strSelect = "SELECT * FROM BookList";
// create a variable to hold an instance of a DataView object
DataView objDataView;
// get DataView from get-dataview-control.ascx user control
objDataView = ctlDataView.GetDataView(strConnect, strSelect);
if (objDataView == null)
return;
// sort the rows in the DataView into the specified order
objDataView.Sort = gstrSortOrder;
// select the rows in the DataView that match the filter
objDataView.RowFilter = gstrFindText;
// set the DataSource property of the DataList
MyDataGrid.DataSource = objDataView;
// and bind the control to the data
MyDataGrid.DataBind();
}
</script>
<!--------------------------------------------------------------------------->
<!-- #include file="..\global\foot.inc" -->
</body>
</html>
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