ASP.NET页面间跳转和传递数据(转)
在ASP.NET中,从一个页面到另一个页面,如何实现跨页数据传递呢?
例如源页面Default.aspx有一个文本框(txtMsg)和一个按钮(btnOK),要求单击按钮时跳转到目标页面Target.aspx,并在目标页面显示txtMsg的文本。
主要有以下几种方法:
1. 设置Default.aspx的按钮btnOK的PostBackUrl属性为目标页;
Target.aspx添加代码:
protected void Page_Load(object sender, EventArgs e)
{
if (PreviousPage != null)
{
if (PreviousPage.IsCrossPagePostBack)
{
string msg = ((TextBox)PreviousPage.FindControl("txtMsg")).Text;
Response.Write("这是跨页回发,传递的信息是:" + msg);
}
}
}
2. 使用Session
Default.aspx:
protected void btnOK_Click(object sender, EventArgs e)
{
Session["msg"] = txtMsg.Text.Trim();
Response.Redirect("Target.aspx");
}
Target.aspx:
protected void Page_Load(object sender, EventArgs e)
{
if(Session["msg"]!=null)
Response.Write("这是Session传值,传递的信息是:" + Session["msg"].ToString());
}
3. 使用Cookie
Default.aspx:
protected void btnOK_Click(object sender, EventArgs e)
{
Response.Cookies["msg"].Value = txtMsg.Text.Trim();
Response.Redirect("Target.aspx");
}
Target.aspx:
protected void Page_Load(object sender, EventArgs e)
{
if(Request.Cookies["msg"]!=null)
Response.Write("这是Cookie传值,传递的信息是:" + Request.Cookies["msg"].Value);
}
4. 使用QueryString
Default.aspx:
protected void btnOK_Click(object sender, EventArgs e)
{
Response.Redirect("Target.aspx?msg="+txtMsg.Text.Trim());
}
Target.aspx:
protected void Page_Load(object sender, EventArgs e)
{
if(Request.QueryString["msg"]!=null)
Response.Write("这是QueryString传值,传递的信息是:" + Request.QueryString["msg"].ToString());
}
5. 使用Transfer
Default.aspx:
protected void btnOK_Click(object sender, EventArgs e)
{
Server.Transfer("Target.aspx");
}
public string Msg
{
get { return txtMsg.Text.Trim(); }
}
Target.aspx:
protected void Page_Load(object sender, EventArgs e)
{
if (PreviousPage != null)
{
_Default f1 = (_Default)Context.Handler;
if (f1 != null)
Response.Write("这是Transfer传值,传递的信息是:" + f1.Msg);
}
}