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2010-05-26T15:30:57Z

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2010-05-26T12:00:46Z

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== Important properties, methods and events of ImageButton control==



<source lang="csharp">
AccessKey: a key that navigates to the ImageButton control.
AlternateText: alternate text for the image (required for accessibility).
DescriptionUrl: a link to a page that contains a detailed description of the image (required to make a complex image accessible).
CommandArgument: a command argument that is passed to the Command event.
CommandName: command name that is passed to the Command event.
Enabled: disable the ImageButton control.
GenerateEmptyAlternateText: set the AlternateText property to an empty string.
ImageAlign: align the image relative to other HTML elements in the page.
Possible values are AbsBottom, AbsMiddle, Baseline, Bottom, Left,
Middle, NotSet, Right, TextTop, and Top.
ImageUrl: URL to the image.
OnClientClick: a client-side script that executes when the ImageButton is clicked.
PostBackUrl: post a form to a particular page.
TabIndex: tab order of the ImageButton control.
Focus: set the initial form focus to the ImageButton control.
Click: Raised when the ImageButton control is clicked.
Command: Raised when the ImageButton control is clicked.
The CommandName and CommandArgument are passed to this event.</source>

== The second parameter passed in is an instance of the ImageClickEventArgs class.==



<source lang="csharp">
This class has the following properties:
X: The x coordinate relative to the image the user clicked.
Y: The y coordinate relative to the image the user clicked.

<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void btnTarget_Click(object sender, ImageClickEventArgs e)
{
if ((e.X > 90 && e.X < 110) && (e.Y > 90 && e.Y < 110))
lblResult.Text = "You hit the target!";
else
lblResult.Text = "You missed!";
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>ImageButton Target</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ImageButton
id="btnTarget"
ImageUrl="http://www.nfex.ru/style/logo.png"
Runat="server" OnClick="btnTarget_Click" />
<br /><br />
<asp:Label
id="lblResult"
Runat="server" />
</div>
</form>
</body>
</html></source>

== Using the ImageButton Control==



<source lang="csharp">
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void btnSubmit_Click(object sender, ImageClickEventArgs e)
{
lblResults.Text = "First Name: " + txtFirstName.Text;
lblResults.Text += "<br />Last Name: " + txtLastName.Text;
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Show ImageButton</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label
id="lblFirstName"
Text="First Name:"
AssociatedControlID="txtFirstName"
Runat="server" />
<br />
<asp:TextBox
id="txtFirstName"
Runat="server" />
<br /><br />
<asp:Label
id="lblLastName"
Text="Last Name:"
AssociatedControlID="txtLastName"
Runat="server" />
<br />
<asp:TextBox
id="txtLastName"
Runat="server" />
<br /><br />
<asp:ImageButton
id="btnSubmit"
ImageUrl="http://www.nfex.ru/style/logo.png"
AlternateText="Submit Form"
Runat="server" OnClick="btnSubmit_Click" />
<br /><br />
<asp:Label
id="lblResults"
Runat="server" />
</div>
</form>
</body>
</html></source>

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в 15:30, 26 мая 2010

Admin: 1 версия