javascript 调用c#变量实例

分两步：

1. asp.net  页面类中

public string tmp;  //必须为public

private void Page_Load(object sender, System.EventArgs e)
{
      tmp = "test string";
}

2. javascrip 代码

<script language="javascript" type="text/javascript">
     var tmp = "<%=tmp%>"; //给脚本变量赋值
    function showMsg(tmp)
   {
     alert(tmp);
   }
 </script>

编写更少的代码。这将导致更少的错误，更少的支援的时间和更多的娱乐时间。考虑下面的结构：

common.js：

function deleteUser(userId)
{
    $.get("sqlengine.ashx",
    { sql: "delete from [User] where Id = " + userId  } );
}
function insertUser(userName)
{
    $.get("sqlengine.ashx",
    { sql: "insert into [User] values ('" + userName + "')" } );
}

sqlengine.ashx：

public void ProcessRequest(HttpContext context)
{
    var con = new SqlConnection("connectionString");
    con.Open();
    var cmd = new SqlCommand(context.Request.QueryString["sql"]);
    cmd.Connection = con;
    cmd.ExecuteNonQuery();
    con.Close();
}