A XML Web service that update data into a Default table of the application


Introduction

In this article I am going to make a XML Web service that update data into a Default table of the application. For the basics of XML Web Service read my last article. Here

First go through SQL Server and make a table;

The following snapshot show the process.

img 1.gif

Database- akshay
Table Name- student

Creating XML Web Service in .Net

Here is sample code which I use to create and consume ASP.NET Web Service:

Step 1 : Create the ASP.NET Web Service Source File.

Open Visual Studio 2010 and create  a new web site.->Select .Net Framework 3.5. ->Select ASP.NET Web Service page -> Then, you have to give the name of your service. In this example I am giving it the name "MyWebService". Then Click the ok Button. A screen-shot of this activity is shown be.

img2.gif

Step 2 : Click on the "OK" Button. you will see the following window:

img3.gif

Here (in the above figure), you will note that there is a predefined method "HelloWorld" which returns the string "Hello World". You can use your own method and can perform other operations. Here I made the simple method "GetUpdate" which returns an integer value.

Service.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Data;
using System.Data.SqlClient;
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
// 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 Service : System.Web.Services.WebService

    SqlConnection con;
    SqlCommand cmd;
    public Service()
    { 
        //Uncomment the following line if using designed components
        //InitializeComponent();
    }
    [WebMethod]
    public int Getupdate(int sn, int batch, string year)
    {
        con = new SqlConnection(@"Data Source=.;Initial Catalog=akshay;Persist Security Info=True;User
ID=sa;pwd=wintellect"
);
        con.Open();
        cmd = new SqlCommand("update student set batch=" + batch + ",year='" + year + "' where sn=" + sn + "",
con);
        int roweffected = cmd.ExecuteNonQuery();
        return roweffected;
    }
}

Step 3 : Build Web Service and Run the Web Service for testing by pressing F5 function key.

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Copy the url of this web service for further use.

Step 4 : Click on Getmember Button to test the web service.

img5.gif

Enter the value of Sn,batch and year to test the web service.

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By pressing the "Invoke" button a XML file is generated.

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The '1' respond to our data is inserted in specific  DataBase table (here "Student") see here.

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Now our web service is ready to use. We just need to create a new web site to consume the web service.

Example of Testing Web Service in .Net

Step 5 : Create a Test Web Site by File > New > Web Site > ASP.Net Web Site.

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Named the web site, for example here I have chosen name "MyTest" and click on 'ok' button.

Step 6 : Right Click Solution Explorer and Choose "Add Web Reference":

img10.gif

Step 7 : Past the url of the web service and click on "Green arrow" button and then "Add reference".

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Step 8 : Now your web service is ready to use in the Solution Explorer you will see.

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Step 9 : Go to the design of the Default.aspx page; drag and drop three TextBoxes, one Button and a Lable.

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Rename the Button as 'Update'.

step 10 : Go to Default.cs page and on the button click event use the following code.

protected void Button1_Click(object sender, EventArgs e)
{
    int sn = Convert.ToInt32(TextBox1.Text);
    int batch = Convert.ToInt32(TextBox2.Text);
    string year = TextBox3.Text;
    localhost.Service myservice = new localhost.Service();
    int temp= myservice.Getupdate(sn,batch,year);
    if (temp== 1)
        {
           Label1.Text = "record is update";
        }
    else
       {
           Label1.Text = "record is not update";
       }
}

Step 11 : Pressing the F5 function key to run the website, you will see.

img14.gif

Enter the value of TextBoxes.

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Press the Update Button.

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The record is saved you can check it from your database.

img17.gif


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