C＃如何从数组类型Webmethode访问Asp.net标签值？ [英] C# How to Access Asp.net Label value from array type Webmethode?

问题描述

我想从jquery调用数组类型的方法，所以下面的代码工作正常。

 <   script     type   =  text / javascript >  
 $（document）.ready（function（）{
 $（＃tblCustomers tbody tr）。remove（）; 
 $ .ajax（{
 type ：POST，
 url：GetDataByJquery.aspx / GetMessages，
 data：'{roomId：'+ $（＃lblRoomId）。val（）+'}'，
 contentType：application / json; charset = utf-8，
 dataType：json，
 success：function（data）{
 response（$。map（data。 d，function（item）{
 var rows =<   tr  > 
 + <   td     class   ='  customertd' > + item.Username +<   / td  > 
 +<   td     class   ='  customertd' > + item.Sex +<   / td  > 
 + <   td     class   ='  customertd' > + item.Text +<   / td  > 
 +<   td     class   ='  customertd' > + item.TimeStamp +<   / td  > 
 +<   td     class   ='  customertd' > + item.UserID +<   / td  > 
 +<   / tr  > ; 
 $（'＃tblCustomers tbody'）。append（rows）; 
}））
}，
失败：函数（响应）{
 alert（response.d）; 
} 
}）; 
}）; 
 <   / script  >  

因此，我无法通过webmthode获取标签控制值。

 [WebMethod] 
 public static Messages [] GetMessages（string roomId）
 {
 List< Messages> messages = new List< Messages>（）; 
 string strConnString = ConfigurationManager.ConnectionStrings [LinqChatConnectionString]。ConnectionString; 
 
使用（SqlConnection con = new SqlConnection（strConnString））
 {
 using（SqlDataAdapter sda = new SqlDataAdapter（））
 {
 string query = [Get_Messages]; 
 SqlCommand cmd = new SqlCommand（query）; 
 cmd.CommandType = CommandType.StoredProcedure; 
 cmd.Parameters.AddWithValue（@ roomId，roomId）; 
 cmd.Connection = con; 
 sda.SelectCommand = cmd; 
 con.Open（）; 
 SqlDataReader reader = cmd.ExecuteReader（）; 
 
 while（reader.Read（））
 {
 Messages message = new Messages（）; 
 message.Username = reader.GetString（0）; 
 message.Sex = reader.GetString（1）; 
 message.Text = reader.GetString（2）; 
 message.TimeStamp = reader.GetString（3）; 
 message.UserID = reader.GetString（4）; 
 messages.Add（message）; 
} 
} 
} 
返回messages.ToArray（）; 
} 

那么如何将asp.net标签控制值传递给'GetMessages'方法的参数？

解决方案

（document）.ready（function（）{

（＃tblCustomers tbody tr）。remove（）;

.ajax（{
type：POST，
url：GetDataByJquery.aspx / GetMessages，
data：'{roomId：'+

I want to call array type methode from jquery so below code is working fine.

<script type="text/javascript">
        $(document).ready(function () {
            $("#tblCustomers tbody tr").remove();
            $.ajax({
                type: "POST",
                url: "GetDataByJquery.aspx/GetMessages",
                data: '{roomId: "' + $("#lblRoomId").val() + '" }',
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: function (data) {
                    response($.map(data.d, function (item) {
                        var rows = "<tr>"
                    + "<td class='customertd'>" + item.Username + "</td>"
                    + "<td class='customertd'>" + item.Sex + "</td>"
                    + "<td class='customertd'>" + item.Text + "</td>"
                    + "<td class='customertd'>" + item.TimeStamp + "</td>"
                    + "<td class='customertd'>" + item.UserID + "</td>"
                    + "</tr>";
                        $('#tblCustomers tbody').append(rows);
                    }))
                },
                failure: function (response) {
                    alert(response.d);
                }
            });
        });
    </script>

so in this I cant get label control value to pass below webmthode.

[WebMethod]
        public static Messages[] GetMessages(string roomId)
        {
            List<Messages> messages = new List<Messages>();           
            string strConnString = ConfigurationManager.ConnectionStrings["LinqChatConnectionString"].ConnectionString;

            using (SqlConnection con = new SqlConnection(strConnString))
            {
                using (SqlDataAdapter sda = new SqlDataAdapter())
                {
                    string query = "[Get_Messages]";
                    SqlCommand cmd = new SqlCommand(query);
                    cmd.CommandType = CommandType.StoredProcedure;
                    cmd.Parameters.AddWithValue("@roomId", roomId);
                    cmd.Connection = con;
                    sda.SelectCommand = cmd;
                    con.Open();
                    SqlDataReader reader = cmd.ExecuteReader();

                    while (reader.Read())
                    {
                        Messages message = new Messages();
                        message.Username = reader.GetString(0);
                        message.Sex = reader.GetString(1);
                        message.Text = reader.GetString(2);
                        message.TimeStamp = reader.GetString(3);
                        message.UserID = reader.GetString(4);
                        messages.Add(message);
                    }
                }
            }
            return messages.ToArray();
        }

So how to pass asp.net label control value to 'GetMessages' methode's parameter?

解决方案

(document).ready(function () {

("#tblCustomers tbody tr").remove();

.ajax({ type: "POST", url: "GetDataByJquery.aspx/GetMessages", data: '{roomId: "' +

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