jQuery Ajax Example - Call Webservice using JQuery AJax (With Input)

In this article, i will be calling asp.net web service using jQuery Ajax with Input parameter.

If you are new to jQuery and don't know anything about it, I will recommend you to first read following article before reading any further.

• JQuery Basics
• Play with JQuery Live Example and make yourself comfortable
• JQuery Ajax Simple Example

In this article we will take input name and display greeting message. Check out Live Demo

Step 1: Create Asp.net Web Application

Step 2: Open Site.Master and include jQuery Reference by adding below line just before </head> tag.
<!--Include JQuery File-->
<script type="text/javascript" language="Javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.2/jquery.min.js"></script>




Step 3: Open "Default.aspx" and add following code
I have added here h2 title tag, asp.net button, textbox and label.  Please note, that i have declared OnClientClick, I will be calling javascript function, which will internally make jQuery Ajax call to asp.net web service.

<h2>Example 2: Call Webservice using JQuery AJax (With Input)</h2>
<asp:TextBox ID="txtName" runat="server" Text="Enter your name"></asp:TextBox>
<asp:Button ID="btnGetMsg" runat="server" Text="Click Me" OnClientClick="DisplayMessageCall();return false;" /><br />
<asp:Label ID="lblOutput" runat="server" Text=""></asp:Label>

Step 4: Add new folder to solution named "WebService"

Step 5: Right click on "WebService" folder and click add new item, to add new web service.

Step 6: Add code to display message inside "HelloWorld.asmx.cs" file

[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolboxItem(false)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. 
[System.Web.Script.Services.ScriptService]
public class HelloWorld : System.Web.Services.WebService
{


    [WebMethod]
    public string DisplayMessage(string NameInfo)
    {
        return "Welcome " + NameInfo + " to the world of JQuery AJax";
    }
}

Important Note:  Please UnComment line
[System.Web.Script.Services.ScriptService]
In order to allow this Web Service to be called from script, using ASP.NET AJAX



Step 7:  Open "Default.aspx" and Write jQuery function to make webservice call to display greeting message.

<script type = "text/javascript">
    function DisplayMessageCall() {


        var pageUrl = '<%=ResolveUrl("~/WebService/HelloWorld.asmx")%>'


        $.ajax({
            type: "POST",
            url: pageUrl + "/DisplayMessage",
            data: "{'NameInfo':'" + $('#<%=txtName.ClientID%>').val() + "'}",
            contentType: "application/json; charset=utf-8",
            dataType: "json",
            success: OnSuccessCall,
            error: OnErrorCall
        });


    }


    function OnSuccessCall(response) {
        $('#<%=lblOutput.ClientID%>').html(response.d);
    }


    function OnErrorCall(response) {
        alert(response.status + " " + response.statusText);
    }
</script>

Understanding jQuery Ajax call parameter

• http://dotnetguts.blogspot.com/2012/01/jquery-ajax-examples-by-calling-aspnet.html

Now, run the web application and input your name and hit button to see greeting message.

Check out Live Demo of Calling Webservice using JQuery Ajax Example

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