前后台之间的参数传递问题

jjff 2005-10-18 08:49:43

如何在页面不刷新的情况下,将前台的参数传到后台去?

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luoyi107 2006-02-20

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学习....

jjff 2006-02-20

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问题重申：在本页面上，将前台的ID传到后台

xiaomaolover 2005-10-18

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嗯。同意用xmlhttp

swordragon 2005-10-18

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以下是xmlhttp技术的两个例子，分别为同步和异步：
<script language="javascript">

</script>

服务器端接收：
string strID = "",strName = "";

if (Request.QueryString.Keys.Count > 0 && Request.QueryString["strID"].Length > 0)
{
strID = Request.QueryString["strID"].ToString();
}

if (Request.QueryString.Keys.Count > 0 && Request.QueryString["strName"].Length > 0)
{
strName = Request.QueryString["strName"].ToString();
}

huo789 2005-10-18

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有一个CallBack的功能，页面看起来不刷新，实际上与服务器端交互了

SeeSunSet 2005-10-18

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'后台处理页面HttpReceiveData.aspx
<%@ Page Language="vb"%>
<%@ import Namespace = "System" %>
<%@ import Namespace = "System.Data" %>
<%@ import Namespace = "System.Data.SqlClient" %>
<%@ import Namespace = "System.Web.UI" %>
<%@ import Namespace = "System.Web" %>
<script runat="server">
Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)
If Request.ServerVariables("REQUEST_METHOD").ToString() = "POST" Then
Dim connstr As String
connstr = "Password=;Persist Security Info=false;User ID=sa;Initial Catalog=ttt;Data Source=CAP35"
Dim cn As New SqlConnection(connstr)
Dim strSQL As String = "INSERT INTO TestTable (Title,Description) VALUES('" _
+ Request.Form("Title").ToString() + "','" + Request.Form("Desc").ToString() + "')"
cn.Open()
Dim cmd As New SqlCommand(strSQL, cn)
cmd.ExecuteNonQuery()
cn.Close()
cn.Dispose()
cmd.Dispose()
End If
End Sub
</script>

SeeSunSet 2005-10-18

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<HTML>
<HEAD>
<script runat="server">
void Button1_Click(object sender, System.EventArgs e)
{
string strTitle = TextBox1.Text;
string strDesc = TextBox2.Text;
//保证中文正确显示
Encoding encoding = Encoding.GetEncoding("UTF-8");

string postData = "Title=" + strTitle;
string strUrl = "http://cap35/WebApplication1/XMLHTTP/aspx/HttpReceiveData.aspx";
postData += ("&Desc=" + strDesc);
byte[] data = encoding.GetBytes(postData);

// 准备请求...
HttpWebRequest myRequest = (HttpWebRequest)WebRequest.Create(strUrl);
myRequest.Method = "POST";
myRequest.ContentType="application/x-www-form-urlencoded";
myRequest.ContentLength = data.Length;
Stream newStream=myRequest.GetRequestStream();
// 发送数据
newStream.Write(data,0,data.Length);
newStream.Close();
Response.Redirect("HttpSendData.aspx");
}
</script>
</HEAD>
<body>
<form id="HTTPPost" method="post" runat="server">
标题：<asp:TextBox id="TextBox1" runat="server"></asp:TextBox>
<br>
内容：
<br>
<asp:TextBox id="TextBox2" runat="server" TextMode="MultiLine" Rows="10" Columns="100"></asp:TextBox>
<br>
<asp:Button id="Button1" runat="server" Text=" 发送 " onclick="Button1_Click"></asp:Button>
</form>
</body>
</HTML>

netren2000 2005-10-18