в 15:30, 26 мая 2010

2010-05-26T15:30:57Z

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2010-05-26T11:59:57Z

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== A template can contain other controls==



<source lang="csharp">
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Show Links</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Repeater
id="Repeater1"
DataSourceId="srcDefaults"
Runat="server">
<ItemTemplate>
<asp:HyperLink
id="HyperLink1"
Text="<%# Eval("Title") %>"
NavigateUrl="<%# Eval("Id", "Details.aspx?id={0}") %>"
runat="server" />
<br />
</ItemTemplate>
</asp:Repeater>

<asp:SqlDataSource
id="srcDefaults"
ConnectionString="Data Source=.\SQLExpress;
AttachDbFilename=|DataDirectory|MyDatabase.mdf;
Integrated Security=True;User Instance=True"
SelectCommand="SELECT Id, Title FROM Defaults"
Runat="server" />
</div>
</form>
</body>
</html></source>

== Call other methods than the Eval() method in a DataBinding expression==



<source lang="csharp">
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<script runat="server">
public string FormatTitle(Object title)
{
return "<b>" + title.ToString().ToUpper() + "</b>";
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Format Default Titles</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Repeater
id="Repeater1"
DataSourceId="srcDefaults"
Runat="server">
<ItemTemplate>
<%# FormatTitle(Eval("Title")) %>
<hr />
</ItemTemplate>
</asp:Repeater>

<asp:SqlDataSource
id="srcDefaults"
ConnectionString="Data Source=.\SQLExpress;
AttachDbFilename=|DataDirectory|MyDatabase.mdf;
Integrated Security=True;User Instance=True"
SelectCommand="SELECT Title FROM Defaults"
Runat="server" />
</div>
</form>
</body>
</html></source>

== Repeated Value Binding==



<source lang="csharp">
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="RepeatedValueBinding" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<table width="100%">
<tr>
<td>
<select runat="server" ID="Select1" size="3" DataTextField="Key" DataValueField="Value"
NAME="Select1" />
</td>
<td>
<select runat="server" ID="Select2" DataTextField="Key" DataValueField="Value" NAME="Select2" />
</td>
<td>
<asp:ListBox runat="server" ID="Listbox1" Size="3" DataTextField="Key" DataValueField="Value" />
</td>
<td>
<asp:DropDownList runat="server" ID="DropdownList1" DataTextField="Key" DataValueField="Value" />
</td>
<td>
<asp:RadioButtonList runat="server" ID="OptionList1" DataTextField="Key" DataValueField="Value" />
</td>
<td>
<asp:CheckBoxList runat="server" ID="CheckList1" DataTextField="Key" DataValueField="Value" />
</td>
</tr>
</table>
<asp:Button runat="server" Text="Get Selection" ID="cmdGetSelection" OnClick="cmdGetSelection_Click" />
<br>
<br>
<asp:Literal runat="server" ID="Result" EnableViewState="False" />
</div>
</form>
</body>
</html>
File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class RepeatedValueBinding : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
Hashtable ht = new Hashtable(3);
ht.Add("value1", "Key1");
ht.Add("value2", "Key2");
ht.Add("value3", "Key3");
Select1.DataSource = ht;
Select2.DataSource = ht;
Listbox1.DataSource = ht;
DropdownList1.DataSource = ht;
CheckList1.DataSource = ht;
OptionList1.DataSource = ht;
Page.DataBind();
}
}
protected void cmdGetSelection_Click(object sender, EventArgs e)
{
if (Select1.SelectedIndex != -1)
Result.Text += "- Item selected in Select1: " + Select1.Items[Select1.SelectedIndex].Text + " - " + Select1.Value + "<br>";

if (Select2.SelectedIndex != -1)
Result.Text += "- Item selected in Select2: " + Select2.Items[Select2.SelectedIndex].Text + " - " + Select2.Value + "<br>";
if (Listbox1.SelectedIndex != -1)
Result.Text += "- Item selected in Listbox1: " + Listbox1.SelectedItem.Text + " - " + Listbox1.SelectedItem.Value + "<br>";
if (DropdownList1.SelectedIndex != -1)
Result.Text += "- Item selected in DropdownList1: " + DropdownList1.SelectedItem.Text + " - " + DropdownList1.SelectedItem.Value + "<br>";
if (OptionList1.SelectedIndex != -1)
Result.Text += "- Item selected in OptionList1: " + OptionList1.SelectedItem.Text + " - " + OptionList1.SelectedItem.Value + "<br>";
if (CheckList1.SelectedIndex != -1)
{
Result.Text += "- Items selected in CheckList1: ";
foreach (ListItem li in CheckList1.Items)
{
if (li.Selected)
Result.Text += li.Text + " - " + li.Value + " ";
}
}
}
}</source>

== Single value binding==



<source lang="csharp">
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="SingleValueBinding" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Image runat="server" ImageUrl="<%# FilePath %>" ID="Image1"/><br>
<asp:Label runat="server" Text="<%# FilePath %>" ID="Label1"/><br>
<asp:TextBox runat="server" Text="<%# GetFilePath() %>" ID="Textbox1"/><br>
<asp:HyperLink runat="server" NavigateUrl="<%# LogoPath.Value %>"
Font-Bold="True" Text="Show logo" ID="Hyperlink1"/><br>
<input type="hidden" runat="server" ID="LogoPath" value="apress.gif" NAME="LogoPath">
<b>
<%# FilePath %>
</b>
<br>
<img src="<%# GetFilePath() %>">
</div>
</form>
</body>
</html>
File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class SingleValueBinding : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
this.DataBind();
}
protected string GetFilePath()
{
return "http://www.nfex.ru/style/logo.png";
}
protected string FilePath
{
get { return "http://www.nfex.ru/style/logo.png"; }
}
}</source>

== Understanding Templates and DataBinding Expressions==



<source lang="csharp">
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Show ItemTemplate</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Repeater
id="Repeater1"
DataSourceId="srcDefaults"
Runat="server">
<ItemTemplate>
<%#Eval("Title")%>
<i>directed by</i>
<%#Eval("Director")%>
<hr />
</ItemTemplate>
</asp:Repeater>

<asp:SqlDataSource
id="srcDefaults"
ConnectionString="Data Source=.\SQLExpress;
AttachDbFilename=|DataDirectory|MyDatabase.mdf;
Integrated Security=True;User Instance=True"
SelectCommand="SELECT Title,Director FROM Defaults"
Runat="server" />
</div>
</form>
</body>
</html></source>

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ASP.NET Tutorial/Data Binding/DataBinding Expressions - История изменений

в 15:30, 26 мая 2010

Admin: 1 версия