创建服务器端控件,该控件映射到 <img> HTML 元素并允许您显示图像。
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<img
EnableViewState="False|True"
Id="string"
Visible="False|True"
OnDataBinding="OnDataBinding event handler"
OnDisposed="OnDisposed event handler"
OnInit="OnInit event handler"
OnLoad="OnLoad event handler"
OnPreRender="OnPreRender event handler"
OnUnload="OnUnload event handler"
runat="server"
/> |
备注
示例
下面的示例显示如何基于用户选择更改显示的图像。它将 /images
目录指定为要显示的图像的源路径。在 Web 窗体页的 HtmlSelect 控件中选定的值确定要显示 /images
目录中的哪个图像。
Visual Basic? | 复制代码 |
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<%@ Page Language="VB" AutoEventWireup="True" %>
<html>
<head>
<title>HtmlImage Control</title>
<script runat="server">
Sub SubmitBtn_Click(Sender As Object, e As EventArgs)
Image1.Src = "/images/" & Select1.Value
End Sub
</script>
</head>
<body>
<h3>HtmlImage Sample</h3>
<form id="Form1" runat="server">
<img ID="Image1" src="/images/cereal1.gif" runat="server"/>
<p>
<p>
Select an image file to display:
<select id="Select1" runat="server">
<option Value="Cereal1.gif">Healthy Grains</option>
<option Value="Cereal2.gif">Corn Flake Cereal</option>
<option Value="Cereal3.gif">U.F.O.S</option>
<option Value="Cereal4.gif">Oatey O's</option>
<option Value="Cereal5.gif">Strike</option>
<option Value="Cereal7.gif">Fruity Pops</option>
</select>
<p>
<p>
<input id="Submit1" type="submit" runat="server" Value="Apply"
OnServerClick="SubmitBtn_Click">
</form>
</body>
</html>
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C#? | 复制代码 |
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<%@ Page Language="C#" AutoEventWireup="True" %>
<html>
<head>
<title>HtmlImage Control</title>
<script runat="server">
void SubmitBtn_Click(Object Sender, EventArgs e)
{
Image1.Src="/images/" + Select1.Value;
}
</script>
</head>
<body>
<h3>HtmlImage Sample</h3>
<form id="Form1" runat="server">
<img ID="Image1" src="/images/cereal1.gif" runat="server"/>
<p>
<p>
Select an image file to display:
<select id="Select1" runat="server">
<option Value="Cereal1.gif">Healthy Grains</option>
<option Value="Cereal2.gif">Corn Flake Cereal</option>
<option Value="Cereal3.gif">U.F.O.S</option>
<option Value="Cereal4.gif">Oatey O's</option>
<option Value="Cereal5.gif">Strike</option>
<option Value="Cereal7.gif">Fruity Pops</option>
</select>
<p>
<p>
<input id="Submit1" type="submit" runat="server" Value="Apply"
OnServerClick="SubmitBtn_Click">
</form>
</body>
</html>
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请参见