Methods for adding columns and rows to a asp.net datatable

methods for adding columns and rows to a asp.net DataTableMethod One:

DataTable Tbldatas = new DataTable ("Datas");
DataColumn DC = null;
DC = TBLDATAS.COLUMNS.ADD ("ID", Type.GetType ("System.Int32"));
dc. AutoIncrement = true;//automatically increased
dc. AutoIncrementSeed = 1;//starting at 1
dc. AutoIncrementStep = 1;//Step size is 1
dc. AllowDBNull = false;//

DC = TBLDATAS.COLUMNS.ADD ("Product", Type.GetType ("System.String"));
DC = TBLDATAS.COLUMNS.ADD ("Version", Type.GetType ("System.String"));
DC = TBLDATAS.COLUMNS.ADD ("Description", Type.GetType ("System.String"));

DataRow NewRow;
NewRow = Tbldatas.newrow ();
newrow["Product"] = "Dahua West Tour";
newrow["Version"] = "2.0";
newrow["Description"] = "I like it very much";
TBLDATAS.ROWS.ADD (NewRow);

NewRow = Tbldatas.newrow ();
newrow["Product"] = "Dream West Tour";
newrow["Version"] = "3.0";
newrow["Description"] = "more childish than lying";
TBLDATAS.ROWS.ADD (NewRow);

Method Two:

DataTable Tbldatas = new DataTable ("Datas");
TBLDATAS.COLUMNS.ADD ("ID", Type.GetType ("System.Int32"));
Tbldatas.columns[0]. AutoIncrement = true;
Tbldatas.columns[0]. AutoIncrementSeed = 1;
Tbldatas.columns[0]. AutoIncrementStep = 1;

TBLDATAS.COLUMNS.ADD ("Product", Type.GetType ("System.String"));
TBLDATAS.COLUMNS.ADD ("Version", Type.GetType ("System.String"));
TBLDATAS.COLUMNS.ADD ("Description", Type.GetType ("System.String"));

TBLDATAS.ROWS.ADD (New Object[]{null, "A", "B", "C"});
TBLDATAS.ROWS.ADD (new object[] {null, "a", "B", "C"});
TBLDATAS.ROWS.ADD (new object[] {null, "a", "B", "C"});
TBLDATAS.ROWS.ADD (new object[] {null, "a", "B", "C"});
TBLDATAS.ROWS.ADD (new object[] {null, "a", "B", "C"});

Method Three:
DataTable table = new DataTable ();

Create the first column of a table
DataColumn pricecolumn = new DataColumn ();
The data type of the column
Pricecolumn.datatype = System.Type.GetType ("System.Decimal");
The name of the list
Pricecolumn.columnname = "Price";
Default value for this column
Pricecolumn.defaultvalue = 50;

Create second column of table
DataColumn taxcolumn = new DataColumn ();
Taxcolumn.datatype = System.Type.GetType ("System.Decimal");
Column Name
Taxcolumn.columnname = "tax";
Sets the expression that is used to calculate values in a column or to create an aggregation column
Taxcolumn.expression = "Price * 0.0862";
Create third column.
DataColumn totalcolumn = new DataColumn ();
Totalcolumn.datatype = System.Type.GetType ("System.Decimal");
Totalcolumn.columnname = "Total";
The expression of the column, the value is obtained is the first column and the second column is worth and
Totalcolumn.expression = "Price + tax";

Add all columns to the table
Table. Columns.Add (Pricecolumn);
Table. Columns.Add (Taxcolumn);
Table. Columns.Add (Totalcolumn);

Create a row
DataRow row = table. NewRow ();
Add this row to the table
Table. Rows.Add (row);

Put a table in an attempt
DataView view = new DataView (table);
Dg. DataSource = view;

Dg. DataBind ();