无法比较SqlBulkCopy中的列

这是我的代码：

protected void Button1_Click(object sender, EventArgs e) { string strFileType = System.IO.Path.GetExtension(FileUpload1.FileName).ToString().ToLower(); string strFileName = FileUpload1.PostedFile.FileName.ToString(); FileUpload1.SaveAs(Server.MapPath("~/Import/" + strFileName + strFileType)); string strNewPath = Server.MapPath("~/Import/" + strFileName + strFileType); string excelConnectionString = String.Format(@"Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source="+strNewPath +"; Extended Properties=Excel 8.0;"); //string excelConnectionString = String.Format(@"Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=C:\\myFolder\\Book1.xls;" + "Extended Properties=Excel 8.0;"); // Create Connection to Excel Workbook using (OleDbConnection connection = new OleDbConnection(excelConnectionString)) { OleDbCommand command = new OleDbCommand("Select ID,Data FROM [Sheet1$]", connection); connection.Open(); // Create DbDataReader to Data Worksheet using (DbDataReader dr = command.ExecuteReader()) { // SQL Server Connection String string sqlConnectionString = "Data Source=DITSEC3;Initial Catalog=test;Integrated Security=True"; con.Open(); DataTable dt1 = new DataTable(); string s = "select count(*) from ExcelTable"; string r = ""; SqlCommand cmd1 = new SqlCommand(s, con); try { SqlDataAdapter da1 = new SqlDataAdapter(cmd1); da1.Fill(dt1); } catch { } int RecordCount; RecordCount = Convert.ToInt32(cmd1.ExecuteScalar()); r = RecordCount.ToString(); Label1.Text = r; con.Close(); int prv = Convert.ToInt32(r); //matching columns //SqlBulkCopyColumnMapping mapping1 = new SqlBulkCopyColumnMapping("id", "ida"); //SqlBulkCopyColumnMapping mapping2 = new SqlBulkCopyColumnMapping("data", "dataa"); // Bulk Copy to SQL Server using (SqlBulkCopy bulkCopy = new SqlBulkCopy(sqlConnectionString)) { bulkCopy.DestinationTableName = "ExcelTable"; bulkCopy.WriteToServer(dr); } con.Open(); DataTable dt = new DataTable(); s = "select count(*) from ExcelTable"; r = ""; SqlCommand cmd = new SqlCommand(s, con); try { SqlDataAdapter da = new SqlDataAdapter(cmd); da.Fill(dt); } catch { } RecordCount = Convert.ToInt32(cmd.ExecuteScalar()); r = RecordCount.ToString(); Label1.Text = r; con.Close(); int ltr = Convert.ToInt32(r); if (prv == ltr) { Label1.Text = "No records Added"; } else { Label1.Text = "Records Added Successfully !"; } } } 

我知道我需要添加以下内容：

  SqlBulkCopyColumnMapping mapping1 = new SqlBulkCopyColumnMapping("id", "ida"); SqlBulkCopyColumnMapping mapping2 = new SqlBulkCopyColumnMapping("data", "dataa"); 

但我不确定我应该在上面的代码中添加它

Answer 1

列映射将添加到bulkCopy.ColumnsMappings集合中：

 var mapping1 = new SqlBulkCopyColumnMapping("id", "ida"); bulkCopy.ColumnMappings.Add(mapping1); 

在执行WriteToServer调用之前执行映射。

SqlBulkCopyColumnMapping的MSDN文档包含更多文档和示例。