C# 如何处理在C中类的方法中创建的对象#
我有一个类,我在其中编写了几个方法。我在该类中声明了一些对象,并在C# 如何处理在C中类的方法中创建的对象#,c#,C#,我有一个类,我在其中编写了几个方法。我在该类中声明了一些对象,并在catch块中处置它们。当我试图在其上应用规则集时,它会发出CA2000的警告消息。我的代码如下 public int ValidationExcelBal(string excelPath, string objectReferenceExcelPath) { DataTable dtPointList = new DataTable(); DataTable d
catch
块中处置它们。当我试图在其上应用规则集
时,它会发出CA2000的警告消息。我的代码如下
public int ValidationExcelBal(string excelPath, string objectReferenceExcelPath)
{
DataTable dtPointList = new DataTable();
DataTable dtAlarm = new DataTable();
DataTable dtObjectReference = new DataTable();
try
{
int objectReferenceColNum = -1;
int objectReferenceAlarmColNum = -1;
objGGTAutoBindingToolDal.YomitoriExcelToDataTable(excelPath, ref dtPointList, ref dtAlarm);
objGGTAutoBindingToolDal.ObjectReferenceExcelToData(objectReferenceExcelPath, ref dtObjectReference);
#region code to find object reference column number in excel sheet and Alarm sheet
for (int i = 0; i < dtPointList.Columns.Count; i++)
{
for (int k = 0; k < dtPointList.Rows.Count; k++)
{
if (k < 4)
{
string name = dtPointList.Rows[k][i].ToString().Replace("\n", "").Replace(" ", "");
if (name == "ObjectReference")
{
objectReferenceColNum = i;
break;
}
}
}
}
//code to find colomn number of object reference field in Alarm sheet
for (int j = 0; j < dtAlarm.Columns.Count; j++)
{
string name = dtAlarm.Rows[0][j].ToString();
if (name.Equals("Object Reference"))
{
objectReferenceAlarmColNum = j;
break;
}
}
#endregion
if (objectReferenceColNum == -1 || objectReferenceAlarmColNum == -1)
{
return 1;
}
//if (Convert.ToString(dtObjectReference.Columns[0]).Contains("Bldg Name") || Convert.ToString(dtObjectReference.Columns[1]).Contains("Graphics Name") || Convert.ToString(dtObjectReference.Columns[2]).Contains("Controller Object Reference"))
//{
// return 2;
//}
return 3;
}
catch (Exception)
{
dtPointList.Dispose();
dtAlarm.Dispose();
dtObjectReference.Dispose();
throw;
}
}
Warning 17 CA2000 : Microsoft.Reliability : In method 'GgtAutoBindingToolBal.ValidationExcelBal(string, string)', call System.IDisposable.Dispose on object 'dtPointList' before all references to it are out of scope. D:\Project\Pragati Installer\GGTAutoBindingBll\GgtAutoBindingToolBal.cs 26 GgtAutoBindingBll
最好的做法是使用
语句将手动调用Dispose()
替换为(超出范围时将调用Dispose()
)
例如:
using (DataTable dtPointList = new DataTable()) {
using (DataTable dtAlarm = new DataTable()) {
using (DataTable dtObjectReference = new DataTable()) {
// your code here, no need to call Dispose() on any of these objects
}
}
}
最好的做法是使用语句将手动调用Dispose()
替换为(超出范围时将调用Dispose()
)
例如:
using (DataTable dtPointList = new DataTable()) {
using (DataTable dtAlarm = new DataTable()) {
using (DataTable dtObjectReference = new DataTable()) {
// your code here, no need to call Dispose() on any of these objects
}
}
}
最好的做法是使用语句将手动调用Dispose()
替换为(超出范围时将调用Dispose()
)
例如:
using (DataTable dtPointList = new DataTable()) {
using (DataTable dtAlarm = new DataTable()) {
using (DataTable dtObjectReference = new DataTable()) {
// your code here, no need to call Dispose() on any of these objects
}
}
}
最好的做法是使用语句将手动调用Dispose()
替换为(超出范围时将调用Dispose()
)
例如:
using (DataTable dtPointList = new DataTable()) {
using (DataTable dtAlarm = new DataTable()) {
using (DataTable dtObjectReference = new DataTable()) {
// your code here, no need to call Dispose() on any of these objects
}
}
}
只能在catch块中调用dispose。如果try块中没有异常怎么办?它不也应该在那里处理吗?试试看,看看警告是否符合我的意思。正如在另一个答案中提到的,使用是你最好的选择。这样,资源将在使用代码块的范围内使用
public int ValidationExcelBal(string excelPath, string objectReferenceExcelPath)
{
using (DataTable dtPointList = new DataTable())
{
using (DataTable dtAlarm = new DataTable())
{
using (DataTable dtObjectReference = new DataTable())
{
try
{
int objectReferenceColNum = -1;
int objectReferenceAlarmColNum = -1;
objGGTAutoBindingToolDal.YomitoriExcelToDataTable(excelPath, ref dtPointList, ref dtAlarm);
objGGTAutoBindingToolDal.ObjectReferenceExcelToData(objectReferenceExcelPath, ref dtObjectReference);
#region code to find object reference column number in excel sheet and Alarm sheet
for (int i = 0; i < dtPointList.Columns.Count; i++)
{
for (int k = 0; k < dtPointList.Rows.Count; k++)
{
if (k < 4)
{
string name = dtPointList.Rows[k][i].ToString().Replace("\n", "").Replace(" ", "");
if (name == "ObjectReference")
{
objectReferenceColNum = i;
break;
}
}
}
}
//code to find colomn number of object reference field in Alarm sheet
for (int j = 0; j < dtAlarm.Columns.Count; j++)
{
string name = dtAlarm.Rows[0][j].ToString();
if (name.Equals("Object Reference"))
{
objectReferenceAlarmColNum = j;
break;
}
}
#endregion
if (objectReferenceColNum == -1 || objectReferenceAlarmColNum == -1)
{
return 1;
}
//if (Convert.ToString(dtObjectReference.Columns[0]).Contains("Bldg Name") || Convert.ToString(dtObjectReference.Columns[1]).Contains("Graphics Name") || Convert.ToString(dtObjectReference.Columns[2]).Contains("Controller Object Reference"))
//{
// return 2;
//}
return 3;
}
catch (Exception)
{
dtPointList.Dispose();
dtAlarm.Dispose();
dtObjectReference.Dispose();
throw;
}
}
}
}
}
public int ValidationExcelBal(字符串excelPath,字符串objectReferenceExcelPath)
{
使用(DataTable dtPointList=new DataTable())
{
使用(DataTable dtAlarm=new DataTable())
{
使用(DataTable dtObjectReference=new DataTable())
{
尝试
{
int objectReferenceColNum=-1;
int objectReferenceAlarmColNum=-1;
OBJGGTOOLDAL.YOMITORIEXCELTODATABLE(excelPath、ref dtPointList、ref dtAlarm);
ObjectReferenceExcelToData(objectReferenceExcelPath,ref-dtObjectReference);
#用于在excel工作表和报警表中查找对象参考列编号的区域代码
for(int i=0;i
仅在catch块中调用dispose。如果try块中没有异常怎么办?它不也应该在那里处理吗?试试看,看看警告是否符合我的意思。正如在另一个答案中提到的,使用是你最好的选择。这样,资源将在使用代码块的范围内使用
public int ValidationExcelBal(string excelPath, string objectReferenceExcelPath)
{
using (DataTable dtPointList = new DataTable())
{
using (DataTable dtAlarm = new DataTable())
{
using (DataTable dtObjectReference = new DataTable())
{
try
{
int objectReferenceColNum = -1;
int objectReferenceAlarmColNum = -1;
objGGTAutoBindingToolDal.YomitoriExcelToDataTable(excelPath, ref dtPointList, ref dtAlarm);
objGGTAutoBindingToolDal.ObjectReferenceExcelToData(objectReferenceExcelPath, ref dtObjectReference);
#region code to find object reference column number in excel sheet and Alarm sheet
for (int i = 0; i < dtPointList.Columns.Count; i++)
{
for (int k = 0; k < dtPointList.Rows.Count; k++)
{
if (k < 4)
{
string name = dtPointList.Rows[k][i].ToString().Replace("\n", "").Replace(" ", "");
if (name == "ObjectReference")
{
objectReferenceColNum = i;
break;
}
}
}
}
//code to find colomn number of object reference field in Alarm sheet
for (int j = 0; j < dtAlarm.Columns.Count; j++)
{
string name = dtAlarm.Rows[0][j].ToString();
if (name.Equals("Object Reference"))
{
objectReferenceAlarmColNum = j;
break;
}
}
#endregion
if (objectReferenceColNum == -1 || objectReferenceAlarmColNum == -1)
{
return 1;
}
//if (Convert.ToString(dtObjectReference.Columns[0]).Contains("Bldg Name") || Convert.ToString(dtObjectReference.Columns[1]).Contains("Graphics Name") || Convert.ToString(dtObjectReference.Columns[2]).Contains("Controller Object Reference"))
//{
// return 2;
//}
return 3;
}
catch (Exception)
{
dtPointList.Dispose();
dtAlarm.Dispose();
dtObjectReference.Dispose();
throw;
}
}
}
}
}
public int ValidationExcelBal(字符串excelPath,字符串objectReferenceExcelPath)
{
使用(DataTable dtPointList=new DataTable())
{
使用(DataTable dtAlarm=new DataTable())
{
使用(DataTable dtObjectReference=new DataTable())
{
尝试
{
int objectReferenceColNum=-1;
int objectReferenceAlarmColNum=-1;
OBJGGTOOLDAL.YOMITORIEXCELTODATABLE(excelPath、ref dtPointList、ref dtAlarm);
ObjectReferenceExcelToData(objectReferenceExcelPath,ref-dtObjectReference);
#用于在excel工作表和报警表中查找对象参考列编号的区域代码
for(int i=0;i