更新數據庫，對DataTable進行更改...... confusion

Question

如果我用DataAdapter.Fill(DataTable);填充DataTable，然後用如下簡單的方法更改DataTable中的某一行：DataTable.Rows[0]["Name"] = "New Name";如何輕鬆地將這些更改保存回數據庫？我以爲我可以打電話DataAdapter.Update(DataTable);，但我讀到只適用於TableAdapter（？）。

Answer 1

這是在任何情況下，實際有用的答案其他人需要知道如何做到這一點：

string selectStatement = "SELECT * FROM Contact"; 
System.Data.DataTable dt = new System.Data.DataTable(); 
SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["MyConnectionString"].ConnectionString); 
conn.Open(); 
SqlDataAdapter sqlDa = new SqlDataAdapter(); 
sqlDa.SelectCommand = new SqlCommand(selectStatement, conn); 
SqlCommandBuilder cb = new SqlCommandBuilder(sqlDa); 
sqlDa.Fill(dt); 
dt.Rows[0]["Name"] = "Some new data here"; 
sqlDa.UpdateCommand = cb.GetUpdateCommand(); 
sqlDa.Update(dt); 

Answer 2

採取注SqlBulkCopyOptions.KeepIdentity的，你可能會或可能不希望使用此爲您的情況。

using (var bulkCopy = new SqlBulkCopy(_connection.ConnectionString, SqlBulkCopyOptions.KeepIdentity)) 
{ 
     // my DataTable column names match my SQL Column names, so I simply made this loop. However if your column names don't match, just pass in which datatable name matches the SQL column name in Column Mappings 
     foreach (DataColumn col in table.Columns) 
     { 
      bulkCopy.ColumnMappings.Add(col.ColumnName, col.ColumnName); 
     } 
     bulkCopy.BulkCopyTimeout = 600; 
     bulkCopy.DestinationTableName = destinationTableName; 
     bulkCopy.WriteToServer(table); 
}