Adding rows to a datatable

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When I try to add one more rows at runtime it will overwrite and displaying the current inserted value. I need to add as a next row and so on.

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;

public partial class Default2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {


    }

    protected void btnsave_Click(object sender, EventArgs e)
    {DataTable dt = new DataTable();
        
        DataRow dr;
       
        dt.Columns.Add(new System.Data.DataColumn("Name", typeof(String)));
        dt.Columns.Add(new System.Data.DataColumn("Address", typeof(String)));
        dt.Columns.Add(new System.Data.DataColumn("Cell", typeof(String)));


       

            dr = dt.NewRow();

            dr[0] = TextBox1.Text;
            dr[1] = TextBox2.Text;
            dr[2] = TextBox3.Text;
            dt.Rows.Add(dr);

            Session["CurrentData"] = dt;

            clearfields();
        
        
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        Response.Redirect("Default3.aspx");

    }
    private void clearfields()
    {
        TextBox1.Text = "";
        TextBox2.Text = "";
        TextBox3.Text = "";
    
    
    }
}

Posted 18-Mar-12 23:41pm

rockpune

Updated 19-Mar-12 0:37am

Slacker007

v2

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Comments

chandrashekhar racharla 19-Mar-12 6:44am

Your question is not clear

2 solutions

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BobJanova · Answer 1 · 2012-03-19T00:58:00

Your question isn't really clear but if you're asking what I think you are:

DataTable dt = new DataTable();

This creates a new data table. If you want to re-use an existing one, it needs to be

DataTable dt = something;

... quite possibly

DataTable dt = Session["CurrentData"] as DataTable;

This is pretty basic stuff.

sharad Pyakurel · Answer 2 · 2012-03-19T01:14:00

Your Question is not clear. But, I think you should do like

using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;

namespace WebApplication1
{
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
DataTable dt = new DataTable();
dt.Columns.Add(new System.Data.DataColumn("Name", typeof(String)));
dt.Columns.Add(new System.Data.DataColumn("Address", typeof(String)));
dt.Columns.Add(new System.Data.DataColumn("Cell", typeof(String)));
Session["CurrentData"] = dt;
}
}

protected void btnSave_Click(object sender, EventArgs e)
{
((DataTable)Session["CurrentData"]).Rows.Add(TextBox1.Text, TextBox2.Text, TextBox3.Text);
clearfields();
}

private void clearfields()
{
TextBox1.Text = "";
TextBox2.Text = "";
TextBox3.Text = "";
}

protected void Button1_Click(object sender, EventArgs e)
{
Response.Redirect("Default3.aspx");
}

}
}

Adding rows to a datatable

2 solutions

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