Question

我在C＃asp.net项目中运行了一个foreach循环，该项目在服务器端运行。

在循环的每次迭代完成后，我想在客户端Web浏览器上更新文本框（consolebox.text），以便用户可以看到循环已完成。

它仅在函数完成后更新文本框，因此用户在整个foreach完成之前不会看到进度输出。下面是我的代码，我试过ajax updatepanels无济于事

 protected void Button1_Click(object sender, EventArgs e)
    {

        consolebox.Text = "Please Wait........"+ Environment.NewLine;


            foreach (var listBoxItem in serverlist.Items)
                {
                    string send = listBoxItem.ToString();
                    DELETEPROFILE(send);
                    consolebox.Text += ("" + send + "........Complete" + Environment.NewLine);

                }


    }

Answer 1

您可以通过网络服务完成。使用ajax开始运行，其他服务可以读取功能。

样品：

.aspx的

<script type = "text/javascript">
        function ajaxCall(fsMathod) {
            $.ajax({
                type: "POST",
                url: "Test.aspx/" + fsMathod,
                contentType: "application/json; charset=utf-8",
                dataType: "json",
                success: OnSuccess,
                failure: function (response) {
                    alert(response.d);
                }
            });
        }
        function OnSuccess(response) {
            alert(response.d);
            var TheTextBox = document.getElementById("<%=consolebox.ClientID%>");
            TheTextBox.value = TheTextBox.value + response.d;
        }
    </script>
    <body>
    <form id="form1" runat="server">
    <div style="margin:0 auto; width:20%">
        Textbox: <asp:TextBox ID="consolebox" TextMode="MultiLine" runat="server"></asp:TextBox>
        <br />

        <input id="btnStartAsync" type="button" value="Start Async" onclick = "ajaxCall('startAsync');" />
        <input id="btnReadAsync" type="button" value="Read Async" onclick = "ajaxCall('readAsync')" />

    </div>

    </form>
</body>

C＃

static string CompletedItems = "";
[System.Web.Services.WebMethod]
        public static string readAsync()
        {
            return "" + CompletedItems + "........Complete\n";
        }

        [System.Web.Services.WebMethod]
        public static void startAsync()
        {
            asyncTask();
        }

        private static void asyncTask()
        {
            foreach (var listBoxItem in serverlist.Items)
            {
                string send = listBoxItem.ToString();
                DELETEPROFILE(send);
                //consolebox.Text += ("" + send + "........Complete" + Environment.NewLine);
                CompletedItems += send + ",";
            }
        }

在asp.net中异步输出到文本框

1 个答案: