C # Create a DataTable

  c# Create DataTable Method One: datatable tbldatas = new datatable ("Datas");D atacolumn  Dc = null;dc = tbldatas.columns.add ("ID",  type.gettype ("System.Int32"));d C. autoincrement = true;//automatically increases the DC. The autoincrementseed = 1;//starts at 1DC. The autoincrementstep = 1;//step is 1DC. allowdbnull = false;//Dc = tbldatas.columns.add ("Product",  type.gettype (" System.String "));d C = tbldatas.columns.add (" Version ",  type.gettype (" System.String "));d c =  tbldatas.columns.add ("Description",  type.gettype ("System.String")); Datarow newrow;newrow = tbldatas.newrow (); newrow["Product"] =  "Big Talk Tour"; newRow["Version" ] =  "2.0"; newrow["Description"] =  "I love It"; TblDatas.Rows.Add (NewRow); Newrow = tbldatas.newrow (); newrow["Product"] =  "Fantasy Westward Tour" newrow["Version"] =  "3.0"; newrow["Description"] =  "more childish than big talk"; TblDatas.Rows.Add (NewRow); MethodII: 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 the table DatacoluMn pricecolumn = new datacolumn ();//data type of the column pricecolumn.datatype =  System.Type.GetType ("System.Decimal");//The name of the column pricecolumn.columnname =  "price";// This column has a default value of pricecolumn.defaultvalue = 50;   Create a second column of Table Datacolumn taxcolumn = new datacolumn ();taxcolumn.datatype =  System.Type.GetType ("System.Decimal");//Column name taxcolumn.columnname =  "tax";//Set the column to be an expression, Used to calculate values in a column or to create an aggregate column taxcolumn.expression =  "price * 0.0862";// create third  Column. Datacolumn totalcolumn = new datacolumn ();totalcolumn.datatype =  System.Type.GetType ("System.Decimal");totalcolumn.columnname =  "total";//The column is an expression, The value is obtained is the first column and the second column is worth and totalcolumn.expression =  "Price + tax";   Add all columns to table on table. Columns.Add (pricecolumn); table. Columns.Add (taxcolumn); table. Columns.Add (Totalcolumn); Creates a row of datarow row = table. NewRow ();//Adds this line to the table in table. Rows.Add(row); Place the table in an attempt to dataview view = new dataview (table);d G. datasource = view; Dg. DataBind ();

C # Create a DataTable (go)