当使用Server.Transfer时,保持表单的选项可能会导致在转移到已经激活的页面时引发堆栈溢出错误。这是因为在页面重定向时,还会复制整个表单,并重复触发Page_Load事件,导致无限循环。解决此问题的方法是使用Response.Redirect,或者保存表单的值并手动重定向到目标页面。
以下是使用Response.Redirect解决此问题的示例代码:
protected void btnSubmit_Click(object sender, EventArgs e) { // Save form data string name = txtName.Text; string email = txtEmail.Text; // Redirect to target page string targetUrl = "TargetPage.aspx?name=" + name + "&email=" + email; Response.Redirect(targetUrl); }
如果必须使用Server.Transfer,您可以在源页面中将要传递的表单值保存到Cookie中,然后在目标页面中检查Cookie并使用表单值进行初始化。
以下是使用Cookie解决此问题的示例代码:
// Source page protected void btnSubmit_Click(object sender, EventArgs e) { // Save form data into cookie HttpCookie formDataCookie = new HttpCookie("FormData"); formDataCookie["Name"] = txtName.Text; formDataCookie["Email"] = txtEmail.Text; Response.Cookies.Add(formDataCookie); // Transfer to target page Server.Transfer("TargetPage.aspx"); }
// Target page protected void Page_Load(object sender, EventArgs e) { // Check if FormData cookie exists HttpCookie formDataCookie = Request.Cookies["FormData"]; if (formDataCookie != null) { // Initialize form with saved values txtName.Text = formDataCookie["Name"]; txtEmail.Text = formDataCookie["Email"]; // Delete FormData cookie formDataCookie.Expires = DateTime.Now.AddDays(-1); Response.Cookies.Add(formDataCookie); } }