C# how to write to DataTable

Posted on 2013-02-05
Last Modified: 2013-02-10
I have created a DataSet and a DataTable inside my C# application so I can create a report.  I do not have a SQL database or an Access database.  I want to know how to pass the information from a text box and/or list box to the DataTable that is inside my application.
Question by:millerje
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LVL 16

Assisted Solution

by:Rose Babu
Rose Babu earned 250 total points
ID: 38858780
Have a look on the code below to add data into DataTable.

Controls used in the form

//TextBox txtData
//ListBox lstBoxData

//Button btnAdditToDt
//Button btnAdditToList
//Button btnAddLstDataToGrid

//DataGridView dataGridView1

Add Data into DataTable Form Design
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WinAppCSHARP
    public partial class frmEETxtToDt : Form
        public frmEETxtToDt()

		// Initialise DataTable
        DataTable dt = new DataTable();
        DataRow dr;

        private void frmEETxtToDt_Load(object sender, EventArgs e)
			// Add a temporary column


        void BindGrid()
            dataGridView1.DataSource = null;

            dataGridView1.DataSource = dt;
		// Add TextBox value to DataTable
        private void btnAdditToDt_Click(object sender, EventArgs e)
            if (txtData.Text.Trim().Length > 0)
                dr = dt.NewRow();
                dr["Data"] = txtData.Text;



		// Add TextBox value to ListBox
        private void btnAdditToList_Click(object sender, EventArgs e)
            if (txtData.Text.Trim().Length > 0)

		// Populate ListBox value to DataGridView
        private void btnAddLstDataToGrid_Click(object sender, EventArgs e)

            for (int i = 0; i < lstBoxData.Items.Count - 1; i++)
                dr = dt.NewRow();
                dr["Data"] = lstBoxData.Items[i].ToString();



Open in new window

Hope this code will help you a lot.

Expert Comment

by:Srinivasulu Muppala
ID: 38858834
using System;
using System.Data;

class Program
    static void Main()
      // Create two DataTable instances.
      DataTable table1 = new DataTable("patients");
      table1.Rows.Add("sam", 1);
      table1.Rows.Add("mark", 2);

      DataTable table2 = new DataTable("medications");
      table2.Rows.Add(1, "atenolol");
      table2.Rows.Add(2, "amoxicillin");

      // Create a DataSet and put both tables in it.
      DataSet set = new DataSet("office");

      // Visualize DataSet.
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Expert Comment

by:Srinivasulu Muppala
ID: 38858848
if you want to store data whatever added in data table(s) use this code

//it will write xml file

//it will read xml file

rebind the dataset once you read xml file, so you can load saved data.

Author Comment

ID: 38860043
I think all the above information is good.  I want to make sure my original question was clear though.  In my project I have added a new item and selected "dataset" and named it DataSet_SysInfo.xsd.  In the dataset design view I created a "DataTable" and named it AssetInfo and added columns to it.  I have then designed my report.rdlc to point to that datatable.  So on my report form, in the report viewer I pointed it to report.rdlc. So how to I add information to the datatable I have alread created in design view?

Accepted Solution

rg20 earned 250 total points
ID: 38873593
If it gets stored in the datatable properly, then you could use
DataTable dt = results.tables[0];
then cycle through the rows

something like
DataTable table = GetTable(); // Get the data table.
      foreach (DataRow row in table.Rows) // Loop over the rows.
          Console.WriteLine("--- Row ---"); // Print separator.
          foreach (var item in row.ItemArray) // Loop over the items.
            Console.Write("Item: "); // Print label.
            Console.WriteLine(item); // Invokes ToString abstract method.

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