使用javascript调用Web服务时出现问题 [英] Problem in calling web services using javascript

问题描述

当我尝试调用我的Web服务方法时，即:

When i am trying to call my web service method ie:

public Sample () {

[WebMethod]
public string CheckUserNameAvailability(string userName)
    {
        SqlConnection cn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["Connect"].ConnectionString);
        SqlDataAdapter dap = new SqlDataAdapter("select Email_Id from User_Registration where Email_Id='" + userName + "'", cn);
        DataSet ds = new DataSet();
        dap.Fill(ds);
        if (ds.Tables[0].Rows.Count != 0)
        {
            return "Name Already Exist";
        }
        else
        {
            return "Available";
        }
}
}

然后我尝试使用脚本管理器(即
)对此方法进行引用.

then I am trying to make reference of this method using scripts manager ie.

<asp:ScriptManager ID="ScriptManager1" runat="server">
                    <services>
                    <asp:ServiceReference Path="~/Sample.asmx" />
                    </services>

但是当我在javascript函数中调用我们的方法时，即使我正在使用<％@ import Namespace ="System.Web.Services"％>在aspx页面顶部

错误:-更新JScript Intellisense时出错

请给我解决方案，让我可以轻松地在.aspx页面中访问类.

but when i calling we method in javascript function then it can''t be accessible there even i am using <%@import Namespace="System.Web.Services"%> on the top of aspx page

error:-Error updating JScript Intellisense

please give me the solution how cal i access my class easily in my .aspx page

推荐答案

使用ajax调用来访问Web服务.您需要立即将您的WebMethod设为静态

ajax调用的工作方式如下:

Hi,
Use ajax call to hit the Webservice. you need to make your WebMethod static now

ajax call works like this:

function CheckUserNameAvailability(username) {
          try {

.ajax({ 类型:" ， 网址:" ， 数据:" +用户名+ " ， contentType:" ， dataType:" ， 成功:功能(msg){ 如果(msg.d == " span>){ alert(' 可用..........')； } }， 错误:功能(){ alert(' 发生错误！'); } }); } 捕获(e){ 警报(e); } }

.ajax({ type: "POST", url: "YourForm.aspx/CheckUserNameAvailability", data: "{'userName':'" + username + "'}", contentType: "application/json; charset=utf-8", dataType: "json", success: function (msg) { if (msg.d == "Available") { alert('Available..........'); } }, error: function () { alert('Error occured!'); } }); } catch (e) { alert(e); } }

在这里，将URL的页面名称替换为YourForm.aspx.
当您在javascript中以
调用方法时，将值发送给参数用户名

Here replace your page name with YourForm.aspx in the url.
send value to parameter username when you call the Method in javascript as

<asp:button id="btnCheckName" runat="server" onclientclick="return CheckUserNameAvailability('username');" xmlns:asp="#unknown" />

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