Question

我将excel表导入到表包含的sql server db表中 id |数据（实际上以mm / dd / yyyy为单位）我能够将数据导入数据库表但是我希望将excel表的数据（日期）列转换为yyyy / mm / dd格式，然后再导入到sql server中。这是我导入Excel工作表的代码：

      DataTable dt7 = new DataTable();
      dt7.Load(dr);

                // Bulk Copy to SQL Server
     using (SqlBulkCopy bulkCopy = new SqlBulkCopy(sqlConnectionString))
     {                       


     bulkCopy.DestinationTableName = "ExcelTable";


     bulkCopy.WriteToServer(dt7);


     }
     dr.Close();

我找到了一段将mm / dd / yyyy转换为yyyy / mm / dd的代码：

    string a = "12/20/2012";
    DateTime dt = Convert.ToDateTime(a);
    string st = dt.ToString("yyyy/MM/dd");
    Label1.Text = a;
    Label2.Text = st;

但我不知道如何在我的代码中实现它。我是一个完整的新手，所以你可能需要用代码来解释：（

Answer 1

您必须从DataTable.Pick Date列中检索所有DataRows，修改它，将其重新放回。

DataRow[]  ExcelRows;
ExcelDataTable.Rows.CopyTo(ExcelRows,0);

For(int i=0;i<ExcelRows.Length;i++)//i represents the row
{
     var oldDate=ExcelRows [i]["DateColumn"].ToString();
     var newDate=Convert.ToDateTime(oldDate);   
     ExcelRows [i]["DateColumn"] = newDate.ToString("yyyy/MM/dd");   
}  

 bulkCopy.WriteToServer(ExcelRows);

Answer 2

试试这个：

Imports System.Data
Imports System.Data.OleDb
Imports System.Data.SqlClient
Imports System.Web.Configuration

//Declare Variables - Edit these based on your particular situation
Dim sSQLTable As String = "TempTableForExcelImport"
Dim sExcelFileName As String = "myExcelFile.xls"
Dim sWorkbook As String = "[WorkbookName$]"

//Create our connection strings
Dim sExcelConnectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Server.MapPath(sExcelFileName) & ";Extended Properties=""Excel 8.0;HDR=YES;"""
Dim sSqlConnectionString As String = WebConfigurationManager.ConnectionStrings("MyConnectionString").ToString


//Series of commands to bulk copy data from the excel file into our SQL table
Dim OleDbConn As OleDbConnection = New OleDbConnection(sExcelConnectionString)
Dim OleDbCmd As OleDbCommand = New OleDbCommand(("SELECT * FROM " & sWorkbook), OleDbConn)
OleDbConn.Open()
Dim dr As OleDbDataReader = OleDbCmd.ExecuteReader()


Using bulkCopy As New System.Data.SqlClient.SqlBulkCopy(con) 
bulkCopy.DestinationTableName = "tblExcel" 

//Define ColumnMappings: source(Excel) --destination(DB Table column)   
bulkCopy.ColumnMappings.Add("col1", "col1") 
bulkCopy.ColumnMappings.Add("col2", "col2") 
:
:
bulkCopy.ColumnMappings.Add("col2", ExcelRows [i]["DateColumn"].ToString("yyyy/MM/dd")) //This is for date

bulkCopy.WriteToServer(dr) 

End Using 
bulkCopy.WriteToServer(dr)
OleDbConn.Close()

在SQL Server中导入之前，将DataTable中的日期列转换为所需格式

2 个答案: