ASP.NET保持用户状态的九种选择(上)

£¼form id="Querystring" method="post" runat="server"£¾
£¼asp:validationsummary id="valSummary" Runat="server"£¾
£¼/asp:validationsummary£¾
£¼table£¾
£¼tr£¾
£¼td colSpan="3"£¾Set Querystring Variable:£¼/td£¾
£¼/tr£¾
£¼tr£¾
£¼td£¾Name£¼/td£¾
£¼td£¾£¼asp:textbox id="txtName" Runat="server"£¾£¼/asp:textbox£¾
£¼/td£¾
£¼td£¾£¼asp:requiredfieldvalidator id="nameRequired"
runat="server" Display="Dynamic" ErrorMessage="Name is
required." ControlToValidate="txtName"£¾*
£¼/asp:requiredfieldvalidator£¾£¼/td£¾
£¼/tr£¾
£¼tr£¾
£¼td£¾Value£¼/td£¾
£¼td£¾£¼asp:textbox id="txtValue" Runat="server"£¾
£¼/asp:textbox£¾£¼/td£¾
£¼td£¾£¼asp:requiredfieldvalidator id="valueRequired"
Runat="server" Display="Dynamic" ErrorMessage="Value is
required." ControlToValidate="txtValue"£¾*
£¼/asp:requiredfieldvalidator£¾£¼/td£¾
£¼/tr£¾
£¼tr£¾
£¼td colSpan="3"£¾£¼asp:button id="btnSubmit" Runat="server"
Text="Update Value"£¾£¼/asp:button£¾£¼/td£¾
£¼/tr£¾
£¼/table£¾
£¼asp:Label ID="lblResult" Runat="server" /£¾
£¼a href="querystring.aspx?x=1"£¾Set querystring x equal to 1£¼/a£¾
£¼/form£¾
Querystring.aspx.cs
private void Page_Load(object sender, System.EventArgs e)
{
// ¼ìË÷cookieµÄÖµ
if(Request.QueryString.HasKeys())
{
lblResult.Text = "The values of the £¼b£¾" + txtName.Text +
"£¼/b£¾ querystring parameter are:£¼br£¾";
foreach(string key in Request.QueryString.Keys)
{
lblResult.Text += "[" + key + " = " +
Request.QueryString[key].ToString() + "]£¼br£¾";
}
}
}

private void btnSubmit_Click(object sender, System.EventArgs e)
{
if(IsValid)
{
string url = "querystring.aspx?";
foreach(string key in Request.QueryString.Keys)
{
url += key + "=" + Request.QueryString[key].ToString() + "&";
}
Response.Redirect(url + txtName.Text + "=" +
Server.UrlEncode(txtValue.Text));
}
}