检查this page out。它显示了使用dataadapter进行更新的示例。
以下示例演示如何通过显式设置DataAdapter的UpdateCommand并调用Update方法来更新修改的行。请注意,在UPDATE语句的WHERE子句中指定的参数被设置为使用SourceColumn的原始值。这很重要,因为当前值可能已被修改,可能与数据源中的值不匹配。原始值是用于从数据源填充DataTable的值。
private static void AdapterUpdate(string connectionString)
{
using (SqlConnection connection =
new SqlConnection(connectionString))
{
SqlDataAdapter dataAdpater = new SqlDataAdapter(
"SELECT CategoryID, CategoryName FROM Categories",
connection);
dataAdpater.UpdateCommand = new SqlCommand(
"UPDATE Categories SET CategoryName = @CategoryName " +
"WHERE CategoryID = @CategoryID", connection);
dataAdpater.UpdateCommand.Parameters.Add(
"@CategoryName", SqlDbType.NVarChar, 15, "CategoryName");
SqlParameter parameter = dataAdpater.UpdateCommand.Parameters.Add(
"@CategoryID", SqlDbType.Int);
parameter.SourceColumn = "CategoryID";
parameter.SourceVersion = DataRowVersion.Original;
DataTable categoryTable = new DataTable();
dataAdpater.Fill(categoryTable);
DataRow categoryRow = categoryTable.Rows[0];
categoryRow["CategoryName"] = "New Beverages";
dataAdpater.Update(categoryTable);
Console.WriteLine("Rows after update.");
foreach (DataRow row in categoryTable.Rows)
{
{
Console.WriteLine("{0}: {1}", row[0], row[1]);
}
}
}
}