Asp.Net中的脚本回调和Server.Transfer页面传值
在Asp.Net中经常要用到脚本回调和页面间的传值，下面是关于ScriptCallBack和Server.Transfer简单的示例代码
WebForm1.aspx
给Head中增加__doPostBack脚本，如果页面含有HyperLink等按钮控件，该脚本和2个隐藏控件"__EVENTTARGET"和"__EVENTARGUMENT"由FrameWork自动生成，若没有需要手动添加
<SCRIPT language="javascript">
<!--
function __doPostBack(eventTarget, eventArgument) {
var theform;
if (window.navigator.appName.toLowerCase().indexOf("netscape") > -1) {
theform = document.forms["Form1"];//注意此处的FormID
} else {
theform = document.Form1;//还有此处
}
theform.__EVENTTARGET.value = eventTarget.split("$").join(":");
theform.__EVENTARGUMENT.value = eventArgument;
theform.submit();
}
// -->
</SCRIPT>
<form id="Form1" method="post" runat="server">
<INPUT type="hidden" name="__EVENTTARGET" >
<INPUT type="hidden" name="__EVENTARGUMENT" >
<A href="javascript:__doPostBack('ScriptCallBack','ScriptCallBack')">ScriptCallBack</A>
<ASP:TEXTBOX id="TextBox1" style="Z-INDEX: 101; LEFT: 112px; POSITION: absolute; TOP: 152px" runat="server">sometext</ASP:TEXTBOX>
C#
WebForm1.aspx.cs
private void Page_Load(object sender, System.EventArgs e)
{
if (IsPostBack)
if (Request.Form["__EVENTARGUMENT"]== "ScriptCallBack")
Server.Transfer("WebForm2.aspx", true);//第二个参数指示是否保留页面的Form和QuerryString的值
}
WebForm2.aspx.cs
private void Page_Load(object sender, System.EventArgs e)
{
if(this.Context.Handler != sender)
Response.Write(Request.Form["TextBox1"]);
}
VB.NET
WebForm1.aspx.vb
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
If IsPostBack Then
If Request.Form("__EVENTARGUMENT") = "ScriptCallBack" Then
Server.Transfer("WebForm2.aspx", True)'第二个参数指示是否保留页面的Form和QuerryString的值
End If
End If
End Sub
WebForm2.aspx.vb
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
If Not Me.Context.Handler Is sender Then
Response.Write(Request.Form("TextBox1"))
End If
End Sub