如何初始化数组datarow [英] how can initialize array datarow

问题描述

嗨所有

i想要初始化数据行阵列但我不能

任何帮助都会有用

提前感谢

我的代码

hi to all
i want to intialize data row array but i cant
any help will be usefull
thanks in advance
my code

	DataRow[] operationsOnAbcenceDataRow;
			if (rowType == (int)RowType.Absence)
			{
				if (!hasNearStartPermission && !hasNearEndPermission)
					operationsOnAbcenceDataRow = operationOnAbsenceItems.Select(" ID <>  " + (int)OperationOnAbsenceType.ExtendNearStartPermission + "  and ID <> " + (int)OperationOnAbsenceType.ExtendNearStartPermission);
				else if (!hasNearStartPermission && hasNearEndPermission)
					operationsOnAbcenceDataRow = operationOnAbsenceItems.Select(" ID <>  " + (int)OperationOnAbsenceType.ExtendNearStartPermission);
				else if (hasNearStartPermission && !hasNearEndPermission)
					operationsOnAbcenceDataRow = operationOnAbsenceItems.Select(" ID <>  " + (int)OperationOnAbsenceType.ExtendNearEndPermission);
			
			}

if (operationsOnAbcenceDataRow.Length != 0)
{
operationOnAbsenceItems.Clear();
foreach (DataRow row in operationsOnAbcenceDataRow)
 operationOnAbsenceItems.ImportRow(row);
}

我的问题是这行，因为operationsOnAbcenceDataRow不要initioalize我不能使用

operationsOnAbcenceDataRow.Length

my problem is this lines ,because operationsOnAbcenceDataRow dont initioalize i cant use
operationsOnAbcenceDataRow.Length

if (operationsOnAbcenceDataRow.Length != 0)
{
operationOnAbsenceItems.Clear();
foreach (DataRow row in operationsOnAbcenceDataRow)
 operationOnAbsenceItems.ImportRow(row);
}

推荐答案

所以出了什么问题：

So what''s wrong with:

if (operationsOnAbcenceDataRow != null && operationsOnAbcenceDataRow.Length != 0)
{
  operationOnAbsenceItems.Clear();
  foreach (DataRow row in operationsOnAbcenceDataRow)
    operationOnAbsenceItems.ImportRow(row);
}

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