Most of the times programmers fill the DataTable from database. This action fills the schema of the database table into the DataTable. We can bind data controls like GridView, DropdownList to such DataTable. But somtimes what happens is one needs to create a DataTable programmatically. Here I have put the simple method of creating DataTable programmatically in C#.

Create a DataTable instance

DataTable table = new DataTable();

Create 7 columns for this DataTable

DataColumn col1 = new DataColumn("ID");
DataColumn col2 = new DataColumn("Name");
DataColumn col3 = new DataColumn("Checked");
DataColumn col4 = new DataColumn("Description");
DataColumn col5 = new DataColumn("Price");
DataColumn col6 = new DataColumn("Brand");
DataColumn col7 = new DataColumn("Remarks");

Define DataType of the Columns

col1.DataType = System.Type.GetType("System.Int");
col2.DataType = System.Type.GetType("System.String");
col3.DataType = System.Type.GetType("System.Boolean");
col4.DataType = System.Type.GetType("System.String");
col5.DataType = System.Type.GetType("System.Double");
col6.DataType = System.Type.GetType("System.String");
col7.DataType = System.Type.GetType("System.String");

Add All These Columns into DataTable table

table.Columns.Add(col1);
table.Columns.Add(col2);
table.Columns.Add(col3);
table.Columns.Add(col4);
table.Columns.Add(col5);
table.Columns.Add(col6);
table.Columns.Add(col7);

Create a Row in the DataTable table

DataRow row = table.NewRow();

Fill All Columns with Data

row[col1] = 1100;
row[col2] = "Computer Set";
row[col3] = true;
row[col4] = "New computer set";
row[col5] = 32000.00
row[col6] = "NEW BRAND-1100";
row[col7] = "Purchased on July 30,2008";

Add the Row into DataTable

table.Rows.Add(row);

Want to a GridView to this DataTable?

GridView gvTest=new GridView();

gvTest.DataSource = table;
gvTest.DataBind();

You are done! Happy dot netting!!