Two ways of Implementing CRUD Operations in Aspnet with C#

Hi friends,In this article i would like to explain the procedure of CRUD Operations in two ways.we already know Creation,Updation,Deletion operations are very Important.So lets start with First way that is Implementing CRUD operations Outside of the GRID.that means while we are the Editing GRID the data will be Bind to the Forms Controls.

In the second way Inside the grid , that means while we are the Editing GRID the data will be bind inside. In my view First method is best. why because,
 
1. Editing the data in Form controls is easy instead of editing Grid controls

2. No need to apply validations again because we are already applying validations at the time of Form creation,but here w need to  apply validations again for Grid Controls

So lets the First method

First, Open the Default.aspx.cs page

Next,In the Page Load Bind the Grid as follows

protected void Page_Load(object sender, EventArgs e)
    {
       try
        {
          SqlConnection  con = new SqlConnection(ConfigurationManager.ConnectionStrings["Testing"].ToString());
           
            if (!Page.IsPostBack)
            {               
                BindData();                
            }            
        }
        catch (Exception ex)
        {
            lblstatus.Text=ex.message;
        }
   }
   

Next,Create a method BindData()

private void BindData()
    {
        try
        {
            if (con.State == ConnectionState.Closed)
            {
                con.Open();
            }           
            SqlCommand com = new SqlCommand("select * from Testing ", con);
            SqlDataAdapter da = new SqlDataAdapter(com);
            DataSet ds = new DataSet();
            da.Fill(ds, "Testing");
            GvTesting.DataSource = ds;
            GvTesting.DataBind();

        }
        catch (Exception ex)
        {
            lblstatus.Text = ex.Message;
        } 
   }
   
   

Next,Apply the Grid Editing Operation

Editing Procedure

protected void GvTesting_RowEditing(object sender, GridViewEditEventArgs e)
    {
        try
        {
            int id = Convert.ToInt32(GvTesting.DataKeys[e.NewEditIndex].Value);
            com = new SqlCommand("select * from Testing where TestingId='" + id + "'", con);
            SqlDataAdapter da = new SqlDataAdapter(com);
            DataSet ds = new DataSet();
            da.Fill(ds, "Testing");
            if (ds.Tables["Testing"].Rows.Count != 0)
            {
                DataRow dr = ds.Tables["hulling"].Rows[0];
                bindItems(dr);
            }
        }
        catch (Exception ex)
        {
            lblstatus.Text = ex.Message;
        }
    }
    
    

Write the following code to bind the data in Form controls and Hide the submit button and display the Update button

private void bindItems(DataRow dr)
    {
        txtName.Text = dr["Name"].ToString();        
        txtSource.Text = dr["Source"].ToString();        
        lblTestingIdId.Text = dr["TestingId"].ToString();
        
        btnupdate.Visible = true;
        btnsubmit.Visible = false;        
     
    }   
    
    

Next,Write the following code to update the data in database

Updating Procedure

protected void btnupdate_Click(object sender, EventArgs e)
    {
        try
        {
            
            com = new SqlCommand("Update Testing set Name='"+txtName.Text+"',txtSource='"+txtSource.Text+"' where lblTextingId='"+TestingId+"'",con);
            com.ExecuteNonQuery();
            
            lblstatus.Text = "Record Updated";
            lblstatus.ForeColor = Color.Green;
            BindData();
            
            btnupdate.Visible = false;
            btnsubmit.Visible = true;
        }
        catch (Exception ex)
        {
            lblstatus.Text = ex.Message;
        }
    }
    
    

Now, write the following code to delete the record from Testing table

Deletion procedure

protected void GvTesting_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        try
        {
            string id = GvTesting.DataKeys[e.RowIndex].Value.ToString();
            SqlCommand cmdDelete = new SqlCommand();
            cmdDelete.CommandText = "Delete Testing where TestingId=" + int.Parse(id);
            cmdDelete.Connection = con;
            if (con.State == ConnectionState.Closed)
                con.Open();
            cmdDelete.ExecuteNonQuery();
            con.Close();
            BindData();
            lblstatus.Text = "Record Successfully Deleted";
            lblstatus.ForeColor = Color.Red;
        }
        catch (Exception ex)
        {
            lblstatus.Text = "Falied to Delete Record";
            lblstatus.ForeColor = Color.Red;
        }
    }
    
    

Next,write the following code to set the index

protected void GvTestingRowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        GvTesting.EditIndex = -1;
    }
    

That's it.First method is very easy..Now coming to second Method that is CRUD Operations will be applied inside the Grid.. I have already explained this article check out this link 

http://www.developerscode.com/2011/02/how-to-editupdatedelete-and-cancel-in.html

That's it..Happy Coding.:)