|
|
<%@ Page Language="C#" %>
<%@ Register Src="Nav.ascx" TagName="Nav" TagPrefix="uc1" %>
<%@ Register Assembly="CustomGridFormatting" Namespace="CustomGridFormatting" TagPrefix="cc1" %>
<%@ Import Namespace="System.Data" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Formatting Columns in a AutoGenerateColumns GridView</title>
<style type="text/css"> body {font-family: 'Tahoma'; font-size: 10pt;}
td {font-size: 10pt;}
code {font-family: 'monospace'; font-size: 10pt; color: maroon;}
code.blue {color: blue;}
a {text-decoration: none; color: blue;}
</style>
</head>
<body>
<form id="Form1" runat="server">
<uc1:Nav ID="Nav1" runat="server" />
<h3>
Formatting Columns in a AutoGenerateColumns GridView with an Extender</h3>
<p>
This is a simulation of a <code>GridView</code> accepting data from
a source that provides dynamic columns. This could, for example,
be a stored procedure that presents sales-to-date totals by a
category, where the columns could be quarters- or months-to-date.
The values presented in this example are randomly generated.
<br /><br />
<code>AutoGenerateColumns</code> is set to <code class="blue">true</code>, and
a custom extender (an implementation of <code>IExtenderProvider</code>)
is used to apply formatting.
With the
use of an <code>ObjectDataSource</code> and the <code>IExtenderProvider</code>
object, this provides an entirely declarative solution.
<br /><br />
The custom extender adds a <b>UseCustomReportFormat</b> property to each
<code>GridView</code> on the page. The first <code>GridView</code> below
has this property set to <code class="blue">true</code>; the second has it set to
<code class="blue">false</code>.
</p>
<hr />
Number of dynamic value columns to present:
<asp:DropDownList id="dd" runat="server" AutoPostBack="true" >
<asp:ListItem text="1" value="1" />
<asp:ListItem text="2" value="2" />
<asp:ListItem text="3" value="3" />
<asp:ListItem text="4" value="4" />
<asp:ListItem text="5" value="5" Selected="True" />
</asp:DropDownList> <br />
<br />
<asp:GridView ID="myList" runat="server"
Gridlines="None"
CellPadding="4"
BorderStyle="Solid"
BorderWidth="1px"
BorderColor="Black" DataSourceID="ObjectDataSource1"
>
</asp:GridView>
<br />
<p>For comparison, the GridView below is identical to the first,
except that it is not using the custom extender.</p>
<asp:GridView id="myList2" runat="server"
Gridlines="None"
CellPadding="4"
BorderStyle="Solid"
BorderWidth="1px"
BorderColor="Black" DataSourceID="ObjectDataSource1"
>
</asp:GridView>
<br />
<cc1:CustomReportFormatExtender ID="CustomReportFormatExtender1" runat="server">
<Props>
<cc1:ExtenderProperties GridID="myList" UseCustomReportFormat="True" />
<cc1:ExtenderProperties GridID="myList2" UseCustomReportFormat="False" />
</Props>
</cc1:CustomReportFormatExtender>
<br />
<asp:ObjectDataSource ID="ObjectDataSource1" runat="server" SelectMethod="CreateDataSource"
TypeName="DataProvider">
<SelectParameters>
<asp:ControlParameter ControlID="dd" DefaultValue="5" Name="numValueColumns" PropertyName="SelectedValue"
Type="Int32" />
</SelectParameters>
</asp:ObjectDataSource>
</form>
</body>
</html>
|
By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.
If a file you wish to view isn't highlighted, and is a text file (not binary), please
let us know and we'll add colourisation support for it.
With a background in education, music, application development, institutional research, data governance, and business intelligence, I work for the University of Nevada, Las Vegas helping to derive useful information from institutional data. It's an old picture, but one of my favorites.
Submit an article or tip