Brief discussion on DataColumn core architecture design

A few of the DataColumn classes require the constructor of the type parameter as follows:////Summary://Initializes a new instance of the System.Data.DataColumn class with the specified column name and data type. Parameters:

1. Example code for how type parameters are generated when you create a new DataColumn class in C #

Summary: Several constructors of the DataColumn class require the type parameter constructor as follows:////Summary://Initializes a new instance of the System.Data.DataColumn class with the specified column name and data type. Parameters://ColumnName://A String representing the column to be created

2. C#datatable detailed

Introduction: Adding References using System.Data; CREATE TABLE//Create an empty table datatable dt = new DataTable (); Create an empty table named "Table_new" datatable dt = New DataTable ("Table_new"); Create columns//1. Create an empty column DataColumn dc = new DataColumn ();d T. Columns.Add (DC); //

3. Excel data in SQL Server process, encountered a DateTime format problem.

Introduction: First of all I realized the general idea: 1 read the Excel data, assign values to the DataTable, and then show the details on the page description: Some columns are in the database when the datetime format, I am assigned to the DataTable is the following processing DataColumn dtcolumn = new DataColumn (); Dtcolumn.datatype =system.ty

4. SQL Server does not find a column

Description: DataTable objdatatable = new DataTable (); DataColumn DC; DC = new DataColumn ("Customercode"); OBJDATATABLE.COLUMNS.ADD (DC); viewstate["erpsystemapplicationtargetlist"] = objdatatable; Datatableo = (DataTable) viewstate["erpsystemapplication