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如何让asp.net手动执行javascript

热度:838   发布时间:2013-02-25 00:00:00.0
怎么让asp.net手动执行javascript?
JScript code
<script type="text/javascript">    function newpic() {        var bd = document.getElementById("bigimage").href = "Images/3.jpg"        var bs = document.getElementById("smallimage").src = "Images/4.jpg"    }</script>


想做这个操作,大致想在加载page的时候执行,同时里面的图片是需要通过后台代码更换图片地址后再执行的javascript

问下大家有没有办法这样动态的改javascript然后执行javascript?

试过Response.Write(script); 但是没什么反应。



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通过按钮点击,PageLoad时注册

Button1.Attributes.Add("onclick", "newpic()");
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Page.ClientScript.RegisterStartupScript() 方法啊

http://msdn.microsoft.com/zh-cn/library/z9h4dk8y.aspx
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C# code
  ClientScript.RegisterStartupScript(this.GetType(), "", "<script type='text/javascript'>newpic();</script>");
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在页面上放个控件,比如literal,把你要生成的js在服务端包装好,ru:
C# code
public static string GetJS(string id)        {            StringBuilder sb = new StringBuilder();            sb.Append("<script type=\"text/javascript\">");            sb.Append("function OpenDialog()");            sb.Append("{");            sb.Append("var users=window.showModalDialog('SelectUsers.aspx','0','dialogWidth:300px;dialogHeight:450px');");            sb.Append(string.Format("document.getElementById('{0}').value=users;",controlid));            sb.Append("}");            sb.Append("</script>");            return sb.ToString();         }
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.aspx中:
 <asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />

 <img id="smallimage" src="" />
 <asp:Label ID="Label1" runat="server" Text=""></asp:Label>

.cs中:

protected void Button1_Click(object sender, EventArgs e)
{
StringBuilder strSb = new StringBuilder();
string strPic= "Images/4.jpg";

strSb.Append("<script type='text/javascript'>");
strSb.Append("document.getElementById('smallimage').src =");
strSb.Append(strPic);
strSb.Append("</script>");
}
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