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[英]DataTable.Load(FbDataReader) does not load everything into DataTable
[英]Datatable.Load does not work with SqlCeReader
我有这种方法:
public static DataTable ExecuteDataTable(IDbConnection connection, string cmdText)
{
IDbCommand command = connection.CreateCommand();
command.CommandText = cmdText;
command.CommandType = CommandType.Text;
IDataReader reader = command.ExecuteReader();
DataTable dt = new DataTable();
dt.Load(reader);
return dt;
}
当我执行查询时, select * from information_schema.Tables
类型为SQLConnection的连接中select * from information_schema.Tables
。 但是,当我尝试针对SqlCEConnection
类型的连接运行它时, dt.Load(reader)
会引发异常:
System.Data.ConstraintException: Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints.
当然是一个奇怪的问题,但这是一个替代方案:
将数据读入DataSet并将EnforceConstraints设置为false。 然后,您可以返回DataSet.Tables[0]
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