當時的情況是這樣的：
a.aspx頁面 執行一個URL字串訪問b.aspx 然後 b頁面返回一個值給a
a.aspx.cs的一段代碼
複製代碼 代碼如下: string result = ""; public string exec_url(string url)
{
string result = "1";
WebRequest request = WebRequest.Create(url);
try
{
request.Timeout = 20000;//20秒逾時
WebResponse response = request.GetResponse();
Stream resStream = response.GetResponseStream();
StreamReader sr = new StreamReader(resStream);
result = sr.ReadToEnd();
sr.Close();
resStream.Close();
}
catch
{
return "1";
}
return result;
}
b.aspx頁面代碼:複製代碼 代碼如下:<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>無標題頁</title>
</head>
<body>
<form id="form1" runat="server">
<div>
</div>
</form>
</body>
</html>
b.aspx.cs代碼如下：複製代碼 代碼如下:public partial class test : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Response.Write("你好 哈哈！");
}
}
運行時：第一次Label內容顯示正常 但當你不重新整理頁面再點擊按鈕時候就提示
System.Web.HttpException: 此頁的狀態資訊無效,可能已損壞
問題原因：
原來是這樣的：第一次label載入內容時載入的內容為b.aspx
<form>
你好 哈哈！
</form>
再次點擊時原理應該是這個樣子的：
<form>
你好 哈哈！
<form>
你好 哈哈！
</form>
</form>
所以就出錯了呀！
解決辦法為：去掉b.aspx中的form標籤
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