In this article, we will be seeing the steps to create ASMX Service for SharePoint.
Steps to create ASMX service
Follow the below-listed steps to create an ASMX service.
Step 1. Open Visual Studio on your SharePoint Server.
![Visual Studio]()
Step 2. Then, create a new empty SharePoint project, provide the name for the project, and select the path.
![SharePoint]()
Step 3. Enter the target web application URL for the deployment and debugging.
![URL]()
Step 4. Then, click on the Finish button to create a new project.
![Finish button]()
Step 5. Right-click on the project and add the “mapped layout folder” as shown below.
![Layout folder]()
Step 6. Under the layouts folder, you can see another subfolder with the project name as shown below.
![Subfolder]()
Step 7. Right-click on the newly created “SampleASMX” folder and select Add >> New Item.
![SampleASMX]()
Step 8. When you click on the new item, you will get a popup. Select the "General" category from the left navigation, select “Text File.txt”, and provide it a name in the textbox with the .asmx extension, as shown below.
![Text File.txt]()
Step 9. Click on the “Add” button to create the .asmx file under the newly created folder.
![Add]()
Step 10. Open the SampleASMX.asmx file and copy and paste the below markup into the file. Then, change the #assembly strong name# with the strong name of your assembly.
Here is the blog post describing how to get the strong name of your assembly by adding an External Tool into Visual Studio.
<%@ WebService Class="SampleASMX.SampleASMX, #assembly strong name#" %>
![Assembly]()
After that, we will be changing the Strong Assembly Name.
![Strong Assembly]()
Step 11. Right-click the Solution Explorer, add a class file, and provide the name for the class file, as shown below.
![Solution Explorer]()
Step 12. After you have added the class file, add the “system.web.services” reference to the project which is available under the framework assemblies.
![Class file]()
Step 13. Then, open the .cs file which is newly created, and copy and paste the below code to the CS file.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web.Services;
using Microsoft.SharePoint;
namespace SampleASMX
{
public class SampleASMX : WebService
{
[WebMethod]
public string GetSiteListCount()
{
var web = SPContext.Current.Web;
return (web.Title + " contains " + web.Lists.Count.ToString() + " lists.");
}
}
}
Step 14. Finally, build and deploy the service by right-clicking on the project in the Solution Explorer and selecting Deploy.
![Deploy]()
Step 15. After you have deployed the solution successfully, open the browser (i.e. IE or Chrome) and browse the below URL.
_layouts/15/SampleASMX/SampleASMX.asmx
![SampleASMX]()
Step 16. Click the GetSiteListCount link to navigate to a page that will allow you to test your service operation.
![GetSite]()
Step 17. Click "Invoke" to test your service operation.
![Invoke]()
Finally, a window should open that has XML contents, as shown below.
![XML]()
You can use this ASMX service on your client application.
Reference: https://msdn.microsoft.com/en-us/library/ms464040.aspx
Summary
In this article, we have explored how to create an ASMX service for SharePoint and Deployment steps.