DataTable数据批量写入数据库三种方法比较 标签： it 分类： C#1) insert循环插入；2) sqldataadapter.update(dataset,tablename);3) sqlbulkcopy.WriteToServer(datatable);1、生成测试的datatable表，表结构如下：UniqueID(主键，自动增长) | CompanyName | CompanyCode | Address | Owner | Memo共6个字段。SqlConnection sqlconnection = new SqlConnection(connectionString);SqlDataAdapter sqldataadapter = new SqlDataAdapter("select * from Table_1 where 1=2", sqlconnection);DataSet dataset = new DataSet();sqldataadapter.Fill(dataset, "Table_1");DataTable datatable = dataset.Tables[0];//生成20000条记录for (int i = 0; i < 20000; i++){ DataRow datarow = datatable.NewRow(); datarow["CompanyName"] = "companyname"+string.Format("{0:0000}",i); datarow["CompanyCode"] = "companycode" + string.Format("{0:0000}", i); datarow["Address"] = "address" + string.Format("{0:0000}", i); datarow["Owner"] = "owner" + string.Format("{0:0000}", i); datarow["Memo"] = "memo" + string.Format("{0:0000}", i); datatable.Rows.Add(datarow);}复制代码2、使用sqlcommand.executenonquery()方法插入foreach (DataRow datarow in datatable.Rows){string sql = "INSERT INTO [Table_1]([CompanyName],[CompanyCode],[Address],[Owner],)" +"VALUES('" + datarow["CompanyName"].ToString() + "'" +",'" + datarow["CompanyCode"].ToString() + "'" +",'" + datarow["Address"].ToString() + "'" +",'" + datarow["Owner"].ToString() + "'" +",'" + datarow["Memo"].ToString() + "')"; using (SqlConnection sqlconn = new SqlConnection(connectionString)) { sqlconn.Open(); SqlCommand sqlcommand = new SqlCommand(sql, sqlconn); sqlcommand.ExecuteNonQuery(); sqlconn.Close(); }}复制代码插入20000条记录时间:00:00:29.73360003、使用sqldataadapter.update(dataset,tablename);SqlCommand insertcommand = new SqlCommand("INSERT INTO [Table_1]([CompanyName],[CompanyCode],[Address],[Owner],)" +"VALUES(@CompanyName, @CompanyCode,@Address,@Owner,@Memo)",new SqlConnection(connectionString));insertcommand.Parameters.Add("@CompanyName", SqlDbType.NChar, 50, "CompanyName");insertcommand.Parameters.Add("@CompanyCode", SqlDbType.NChar, 25, "CompanyCode");insertcommand.Parameters.Add("@Address", SqlDbType.NChar, 255, "Address");insertcommand.Parameters.Add("@Owner", SqlDbType.NChar, 25, "Owner");insertcommand.Parameters.Add("@Memo", SqlDbType.NChar, 255, "Memo");sqldataadapter.InsertCommand = insertcommand;sqldataadapter.Update(dataset, "Table_1");复制代码插入20000条记录时间:00:00:22.89380004、使用sqlbulkcopy.writetoserver(datatable)SqlBulkCopy sqlbulkcopy = new SqlBulkCopy(connectionString, SqlBulkCopyOptions.UseInternalTransaction);sqlbulkcopy.DestinationTableName = "Table_1";//数据库中的表名sqlbulkcopy.WriteToServer(dataset.Tables[0]);复制代码插入20000条记录时间:00:00:00.3276000所以说速度是sqlbulkcopy最快，sqldataadapter.update()次之，sqlcommand.ExecuteNonQuery()最慢。
转载于:https://www.cnblogs.com/nxxshxf/p/6195333.html
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