private void ConvertColumnFromRow(DataRow row, EnumColumnList enumColumns)
{
if (enumColumns != null && enumColumns.Count > 0)
{
foreach (var entry in enumColumns)
{
Type enumType = entry.EnumType;
if (!enumType.IsEnum)
{
throw new ArgumentException("The type '" + enumType.AssemblyQualifiedName + "' is not enum.", "enumColumns");
}
int columnIndex = entry.ColumnIndex.HasValue ? entry.ColumnIndex.Value : row.Table.Columns.IndexOf(entry.ColumnName + "_ECCentral_Auto_Removed_820319");
if (columnIndex < 0)
{
continue;
}
if (row[columnIndex] == null || row[columnIndex] == DBNull.Value)
{
row[entry.NewColumnIndex] = DBNull.Value;
continue;
}
object orignalData = row[columnIndex];
if (orignalData == null || orignalData == DBNull.Value || orignalData.ToString().Trim().Length <= 0)
{
row[entry.NewColumnIndex] = DBNull.Value;
}
row[entry.NewColumnIndex] = DataMapperHelper.ConvertIfEnum(orignalData, enumType);
}
}
}
/// <summary>
/// 执行返回第一行第一列的值，并自动转换为对应的类型，如果是泛型值且为空则会返回null
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns></returns>
public T ExecuteScalar <T>()
{
object v = DataMapperHelper.ConvertIfEnum(ExecuteScalar(), typeof(T));
return(DataConvertor.GetValue <T>(v, null, null));
}
