A brief discussion on the core architecture design of DataColumn

Several constructors of the DataColumn class that require Type type parameters are as follows: // // Summary:                                 //                                                                                                                                                       using the specified column name and data type to initialize a new instance of the System.Data.DataColumn class.                       // ​​​​//Parameters:  

1. C#Detailed sample code explanation of how to generate Type type parameters when creating a new DataColumn class

: Several constructors that require Type type parameters to be type type parameters are as follows: // // Abstract: // Abstract: Use the specified column name and data type to initialize System.data.dataColumn Example. // Parameters: // columnName: columnName: // A string that represents the column to be created

2. C#DataTable Detailed Explanation

Introduction: Add reference 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 column // 1. Create an empty column DataColumn dc = new DataColumn();dt.Columns.Add(dc); //

##3. During the process of saving excel data into sqlserver, a Datetime format problem was encountered.

Introduction: Let me first talk about the general idea of ​​​​my implementation: 1 Read the excel data, assign it to the datatable, and then display the detailed description on the page: some columns are stored If it is in datetime format when it is sent to the database, I also do the following processing when assigning it to the datatable: DataColumn dtColumn = new DataColumn(); dtColumn.DataType =System.Ty

4. sqlserver Column not found

Introduction: DataTable objDataTable = new DataTable(); DataColumn dc; dc = new DataColumn("CustomerCode"); objDataTable.Columns.Add(dc ); ViewState["ERPSystemApplicationTargetlist"] = objDataTable; DataTableo = (DataTable)ViewState["ERPSystemApplication

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