Image Class (System.Web.UI.WebControls)

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System.Web.UI.WebControls Name ...

Image Class

Image Members
Image Constructor
Image Methods
Image Properties
Image Events

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.NET Framework Class Library

Image Class

Displays an image on a Web page.

Namespace: System.Web.UI.WebControls
Assembly: System.Web (in System.Web.dll)

Syntax

Visual Basic (Declaration)

<AspNetHostingPermissionAttribute(SecurityAction.InheritanceDemand, Level := AspNetHostingPermissionLevel.Minimal)> _
<AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level := AspNetHostingPermissionLevel.Minimal)> _
Public Class Image _
    Inherits WebControl

Visual Basic (Usage)

Dim instance As Image

[AspNetHostingPermissionAttribute(SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
[AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
public class Image : WebControl

Visual C++

[AspNetHostingPermissionAttribute(SecurityAction::InheritanceDemand, Level = AspNetHostingPermissionLevel::Minimal)]
[AspNetHostingPermissionAttribute(SecurityAction::LinkDemand, Level = AspNetHostingPermissionLevel::Minimal)]
public ref class Image : public WebControl

JScript

public class Image extends WebControl

ASP.NET

<asp:Image />

Remarks

The Image control lets you work with images from server code. Use the Image control to display any valid image supported by the requesting browser on the Web page. The path to the displayed image is specified by setting the ImageUrl property. You can specify the text to display in place of image when the image is not available by setting the AlternateText property. The alignment of the image in relation to other elements on the Web page is specified by setting ImageAlign property.

Note:
This control only displays an image. If you need to capture mouse clicks on the image, use the ImageButton control.

Accessibility

The markup rendered by default for this control might not conform to accessibility standards such as the Web Content Accessibility Guidelines 1.0 (WCAG) priority 1 guidelines. For details about accessibility support for this control, see ASP.NET Controls and Accessibility.

Topic	Location
How to: Add Image Web Server Controls to a Web Forms Page	Building ASP .NET Web Applications in Visual Studio
How to: Add Image Web Server Controls to a Web Forms Page	Building ASP .NET Web Applications in Visual Studio
How to: Add Image Web Server Controls to a Web Forms Page	Building ASP .NET Web Applications
How to: Add Image Web Server Controls to a Web Forms Page	Building ASP .NET Web Applications
How to: Add Image Web Server Controls to a Web Forms Page (Visual Studio)	Building ASP .NET Web Applications in Visual Studio
Walkthrough: Creating Accessible Web Pages	Building ASP .NET Web Applications in Visual Studio
Walkthrough: Creating an Accessible Web Application	Building ASP .NET Web Applications in Visual Studio
Walkthrough: Creating an Accessible Web Application	Building Applications with Visual Web Developer
Walkthrough: Creating and Using ASP.NET Master Pages in Visual Web Developer	Building ASP .NET Web Applications in Visual Studio
Walkthrough: Creating and Using ASP.NET Master Pages in Visual Web Developer	Building Applications with Visual Web Developer
Walkthrough: Creating and Using ASP.NET Master Pages in Visual Web Developer	Building ASP .NET Web Applications in Visual Studio

Examples

The following example demonstrates how to create an Image control on a Web page.

Note:
The following code sample uses the single-file code model and may not work correctly if copied directly into a code-behind file. This code sample must be copied into an empty text file that has an .aspx extension. For more information on the Web Forms code model, see ASP.NET Web Page Code Model.

Visual Basic

<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html  >
<head>
    <title>Image Example</title>
<script language="VB" runat="server">

      Sub Button_Click(sender As Object, e As EventArgs)
         Select Case DropList1.SelectedIndex
            Case 0:
               Image1.ImageAlign = ImageAlign.NotSet

            Case 1:
               Image1.ImageAlign = ImageAlign.Left

            Case 2:
               Image1.ImageAlign = ImageAlign.Right

            Case 3:
               Image1.ImageAlign = ImageAlign.Baseline

            Case 4:
               Image1.ImageAlign = ImageAlign.Top

            Case 5:
               Image1.ImageAlign = ImageAlign.Middle

            Case 6:
               Image1.ImageAlign = ImageAlign.Bottom

            Case 7:
               Image1.ImageAlign = ImageAlign.AbsBottom

            Case 8:
               Image1.ImageAlign = ImageAlign.AbsMiddle

            Case 9:
               Image1.ImageAlign = ImageAlign.TextTop

            Case Else:
               Image1.ImageAlign = ImageAlign.NotSet

         End Select
      End Sub

   </script>

</head>

<body>

   <form id="form1" runat="server">

      <h3>Image Example</h3>

      <div style="font-size:large">

         Text Text Text Text Text Text Text Text Text Text Text Text 
         Text Text Text Text Text Text Text Text Text Text Text Text 
         Text Text Text Text Text Text Text Text Text Text Text Text

      </div> 

      <asp:Image id="Image1" runat="server"
           AlternateText="Image text"
           ImageAlign="left"
           ImageUrl="images/image1.jpg"/>

      <hr />

      Select Image Align: <br />

      <asp:DropDownList id="DropList1"
           runat="server">

         <asp:ListItem>NotSet</asp:ListItem>
         <asp:ListItem>Left</asp:ListItem>
         <asp:ListItem>Right</asp:ListItem>
         <asp:ListItem>BaseLine</asp:ListItem>
         <asp:ListItem>Top</asp:ListItem>
         <asp:ListItem>Middle</asp:ListItem>
         <asp:ListItem>Bottom</asp:ListItem>
         <asp:ListItem>AbsBottom</asp:ListItem>
         <asp:ListItem>AbsMiddle</asp:ListItem>
         <asp:ListItem>TextTop</asp:ListItem>     

      </asp:DropDownList>

      <br /><br />

      <asp:Button id="Button1"
           Text="Apply Image Alignment"
           OnClick="Button_Click" 
           runat="server"/>

   </form>

</body>
</html>

<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html  >
<head>
    <title>Image Example</title>
<script language="C#" runat="server">

      void Button_Click(Object sender, EventArgs e)
      {
         switch(DropList1.SelectedIndex)
         {
            case 0:
               Image1.ImageAlign = ImageAlign.NotSet;
               break;

            case 1:
               Image1.ImageAlign = ImageAlign.Left;
               break;

            case 2:
               Image1.ImageAlign = ImageAlign.Right;
               break;

            case 3:
               Image1.ImageAlign = ImageAlign.Baseline;
               break;

            case 4:
               Image1.ImageAlign = ImageAlign.Top;
               break;

            case 5:
               Image1.ImageAlign = ImageAlign.Middle;
               break;

            case 6:
               Image1.ImageAlign = ImageAlign.Bottom;
               break;

            case 7:
               Image1.ImageAlign = ImageAlign.AbsBottom;
               break;

            case 8:
               Image1.ImageAlign = ImageAlign.AbsMiddle;
               break;

            case 9:
               Image1.ImageAlign = ImageAlign.TextTop;
               break;

            default:
               Image1.ImageAlign = ImageAlign.NotSet;
               break;

         }

      }

   </script>

</head>

<body>

   <form id="form1" runat="server">

      <h3>Image Example</h3>

      <div style="font-size:large">

         Text Text Text Text Text Text Text Text Text Text Text Text 
         Text Text Text Text Text Text Text Text Text Text Text Text 
         Text Text Text Text Text Text Text Text Text Text Text Text

      </div> 

      <asp:Image id="Image1" runat="server"
           AlternateText="Image text"
           ImageAlign="left"
           ImageUrl="images/image1.jpg"/>

      <hr />

      Select Image Align: <br />

      <asp:DropDownList id="DropList1"
           runat="server">

         <asp:ListItem>NotSet</asp:ListItem>
         <asp:ListItem>Left</asp:ListItem>
         <asp:ListItem>Right</asp:ListItem>
         <asp:ListItem>BaseLine</asp:ListItem>
         <asp:ListItem>Top</asp:ListItem>
         <asp:ListItem>Middle</asp:ListItem>
         <asp:ListItem>Bottom</asp:ListItem>
         <asp:ListItem>AbsBottom</asp:ListItem>
         <asp:ListItem>AbsMiddle</asp:ListItem>
         <asp:ListItem>TextTop</asp:ListItem>     

      </asp:DropDownList>

      <br /><br />

      <asp:Button id="Button1"
           Text="Apply Image Alignment"
           OnClick="Button_Click" 
           runat="server"/>

   </form>

</body>
</html>

JScript

<%@ Page Language="JSCRIPT" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html  >
<head>
    <title>Image Example</title>
<script language="JSCRIPT" runat="server">

      function Button_Click(sender : Object, e : EventArgs){
         switch(DropList1.SelectedIndex){
            case 0:
               Image1.ImageAlign = ImageAlign.NotSet
               break
            case 1:
               Image1.ImageAlign = ImageAlign.Left
               break
            case 2:
               Image1.ImageAlign = ImageAlign.Right
               break
            case 3:
               Image1.ImageAlign = ImageAlign.Baseline
               break
            case 4:
               Image1.ImageAlign = ImageAlign.Top
               break
            case 5:
               Image1.ImageAlign = ImageAlign.Middle
               break
            case 6:
               Image1.ImageAlign = ImageAlign.Bottom
               break
            case 7:
               Image1.ImageAlign = ImageAlign.AbsBottom
               break
            case 8:
               Image1.ImageAlign = ImageAlign.AbsMiddle
               break
            case 9:
               Image1.ImageAlign = ImageAlign.TextTop
               break
            default:
               Image1.ImageAlign = ImageAlign.NotSet
               break
         }
      }

   </script>

</head>

<body>

   <form id="form1" runat="server">

      <h3>Image Example</h3>

      <div style="font-size:large">

         Text Text Text Text Text Text Text Text Text Text Text Text 
         Text Text Text Text Text Text Text Text Text Text Text Text 
         Text Text Text Text Text Text Text Text Text Text Text Text

      </div> 

      <asp:Image id="Image1" runat="server"
           AlternateText="Image text"
           ImageAlign="left"
           ImageUrl="images/image1.jpg"/>

      <hr />

      Select Image Align: <br />

      <asp:DropDownList id="DropList1"
           runat="server">

         <asp:ListItem>NotSet</asp:ListItem>
         <asp:ListItem>Left</asp:ListItem>
         <asp:ListItem>Right</asp:ListItem>
         <asp:ListItem>BaseLine</asp:ListItem>
         <asp:ListItem>Top</asp:ListItem>
         <asp:ListItem>Middle</asp:ListItem>
         <asp:ListItem>Bottom</asp:ListItem>
         <asp:ListItem>AbsBottom</asp:ListItem>
         <asp:ListItem>AbsMiddle</asp:ListItem>
         <asp:ListItem>TextTop</asp:ListItem>     

      </asp:DropDownList>

      <br /><br />

      <asp:Button id="Button1"
           Text="Apply Image Alignment"
           OnClick="Button_Click" 
           runat="server"/>

   </form>

</body>
</html>

.NET Framework Security

AspNetHostingPermission
for operating in a hosted environment. Demand value: LinkDemand. Permission value: Minimal.
AspNetHostingPermission
for operating in a hosted environment. Demand value: InheritanceDemand. Permission value: Minimal.

Inheritance Hierarchy

System..::.Object
  System.Web.UI..::.Control
    System.Web.UI.WebControls..::.WebControl
      System.Web.UI.WebControls..::.Image
        System.Web.UI.WebControls..::.ImageButton
        System.Web.UI.WebControls..::.ImageMap

Thread Safety

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Version Information

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

Reference

Image Members

System.Web.UI.WebControls Namespace

ImageUrl

AlternateText

ImageAlign

Other Resources

Image Web Server Control Overview

Securing Standard Controls

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