使用Windbg查看內存中DataTable的值時，其實方法和查看普通對象是一樣的，唯一要注意的時，DataTable對象中值的存儲方式有些特別，DataRow中的值是存存放在DataTable的columnCollection中的，思路如下：
1、使用！dumpheap -stat 查找到DataTable的引用
2、使用！do查找到columnCollection
3、查看columnCollection的items是一個OBJECT[]，其中每個對象都是System.Data.DataColumn。
4、數據是存放在System.Data.DataColumn的storage中。

直接看代碼和步驟吧。
測試代碼如下：
Code
????????private?DataTable?m_dtTable=null;

????????private?void?button1_Click(object?sender,?System.EventArgs?e)
????????{
????????????Thread?thread=new?Thread(new?ThreadStart(DoThread));
????????????thread.Start();
????????}

????????private?void?DoThread()
????????{
????????????for(int?Index=0;Index<100;Index++)
????????????{
????????????????TestData?data=new?TestData("test",Index);
????????????????DataRow?dr=this.m_dtTable.NewRow();
????????????????dr["Name"]="Test"+Index.ToString();
????????????????dr["Age"]=Index;
????????????????this.m_dtTable.Rows.Add(dr);
????????????}

????????????GC.Collect();
????????}
1.查找到DataTable的引用
0:003> !dumpheap -stat
total 3,790 objects
Statistics:
??????? MT????? Count???? TotalSize Class Name
0x7bec812c????????? 1??????????? 12 System.Xml.XmlNonNormalizer
0x7bec7e9c????????? 1??????????? 12 System.Xml.XmlDownloadManager
....................................................
0x002d6970????????? 1?????????? 232 System.Data.DataTable
.......................................

2. 查看DataTable
0:003> !dumpheap -mt 0x002d6970
?? Address???????? MT???? Size? Gen
0x01e08a64 0x002d6970????? 232 1 System.Data.DataTable
total 1 objects
0:003> !dumpobj 0x01e08a64
Name: System.Data.DataTable
MethodTable 0x002d6970
EEClass 0x03df0bd0
Size 232(0xe8) bytes
GC Generation: 1
mdToken: 0x0200003d? (c:\windows\assembly\gac\system.data\1.0.5000.0__b77a5c561934e089\system.data.dll)
FieldDesc*: 0x002d5ab8
??????? MT????? Field???? Offset???????????????? Type?????? Attr????? Value Name
0x7b308b0c 0x4000583????? 0x4??????????????? CLASS?? instance 0x00000000 site
0x7b308b0c 0x4000584????? 0x8??????????????? CLASS?? instance 0x00000000 events
0x7b308b0c 0x4000582???? 0x44??????????????? CLASS???? static 0x01e08d50 EventDisposed
0x002d6970 0x40003ee????? 0xc??????????????? CLASS?? instance 0x00000000 dataSet
0x002d6970 0x40003ef???? 0x10??????????????? CLASS?? instance 0x00000000 defaultView
0x002d6970 0x40003f0???? 0xa8???????? System.Int32?? instance 101 nextRowID
0x002d6970 0x40003f1???? 0x14??????????????? CLASS?? instance 0x01e08e34 rowCollection
0x002d6970 0x40003f2???? 0x18??????????????? CLASS?? instance 0x01e09080 columnCollection
0x002d6970 0x40003f3???? 0x1c??????????????? CLASS?? instance 0x01e08ec8 constraintCollection
0x002d6970 0x40003f4???? 0xac???????? System.Int32?? instance 2 elementColumnCount
0x002d6970 0x40003f5???? 0x20??????????????? CLASS?? instance 0x01e08f50 parentRelationsCollection
0x002d6970 0x40003f6???? 0x24??????????????? CLASS?? instance 0x01e08fe0 childRelationsCollection
0x002d6970 0x40003f7???? 0x28??????????????? CLASS?? instance 0x01e08d5c recordManager
0x002d6970 0x40003f8???? 0x2c??????????????? CLASS?? instance 0x01e092b0 indexes
0x002d6970 0x40003f9???? 0x30??????????????? CLASS?? instance 0x00000000 shadowIndexes
0x002d6970 0x40003fa???? 0x34??????????????? CLASS?? instance 0x00000000 extendedProperties
0x002d6970 0x40003fb???? 0x38??????????????? CLASS?? instance 0x01dd1200 tableName
0x002d6970 0x40003fc???? 0x3c??????????????? CLASS?? instance 0x00000000 tableNamespace
0x002d6970 0x40003fd???? 0x40??????????????? CLASS?? instance 0x01dd1200 tablePrefix
0x002d6970 0x40003fe???? 0xb4?????? System.Boolean?? instance 0 caseSensitive
0x002d6970 0x40003ff???? 0xb5?????? System.Boolean?? instance 1 caseSensitiveAmbient
0x002d6970 0x4000400???? 0x44??????????????? CLASS?? instance 0x00000000 culture
0x002d6970 0x4000401???? 0x48??????????????? CLASS?? instance 0x00000000 displayExpression
0x002d6970 0x4000402???? 0x4c??????????????? CLASS?? instance 0x01dddac8 compareInfo
0x002d6970 0x4000403???? 0xb0???????? System.Int32?? instance 25 compareFlags
0x002d6970 0x4000404???? 0xb6?????? System.Boolean?? instance 1 fNestedInDataset
0x002d6970 0x4000405???? 0x50??????????????? CLASS?? instance 0x00000000 encodedTableName
0x002d6970 0x4000406???? 0x54??????????????? CLASS?? instance 0x00000000 xmlText
0x002d6970 0x4000407???? 0x58??????????????? CLASS?? instance 0x00000000 _colUnique
0x002d6970 0x4000408???? 0xb7?????? System.Boolean?? instance 0 textOnly
0x002d6970 0x4000409???? 0xc4??????????? VALUETYPE?? instance start at 01e08b28 minOccurs
0x002d6970 0x400040a???? 0xd4??????????? VALUETYPE?? instance start at 01e08b38 maxOccurs
0x002d6970 0x400040b???? 0xb8?????? System.Boolean?? instance 0 repeatableElement
0x002d6970 0x400040c???? 0x5c??????????????? CLASS?? instance 0x01e08b68 typeName
0x002d6970 0x400040f???? 0x60??????????????? CLASS?? instance 0x00000000 primaryKey
0x002d6970 0x4000410???? 0x64??????????????? CLASS?? instance 0x01e08b4c primaryIndex
0x002d6970 0x4000411???? 0x68??????????????? CLASS?? instance 0x00000000 delayedSetPrimaryKey
..................................

查看具體的columnCollection
0:003> !do 0x01e09080
Name: System.Data.DataColumnCollection
MethodTable 0x002d71dc
EEClass 0x03df0c98
Size 52(0x34) bytes
GC Generation: 1
mdToken: 0x0200001a? (c:\windows\assembly\gac\system.data\1.0.5000.0__b77a5c561934e089\system.data.dll)
FieldDesc*: 0x002d6e18
??????? MT????? Field???? Offset???????????????? Type?????? Attr????? Value Name
0x002d6da0 0x4000331???? 0x3c??????????????? CLASS???? static 0x01e08de4 RefreshEventArgs
0x002d71dc 0x4000376????? 0x4??????????????? CLASS?? instance 0x01e08a64 table
0x002d71dc 0x4000377????? 0x8??????????????? CLASS?? instance 0x01e090b4 list
0x002d71dc 0x4000378???? 0x28???????? System.Int32?? instance 1 defaultNameIndex
0x002d71dc 0x4000379????? 0xc??????????????? CLASS?? instance 0x00000000 delayedAddRangeColumns
0x002d71dc 0x400037a???? 0x10??????????????? CLASS?? instance 0x01e09670 columnQueue
0x002d71dc 0x400037b???? 0x14??????????????? CLASS?? instance 0x01e0911c columnFromName
0x002d71dc 0x400037c???? 0x18??????????????? CLASS?? instance 0x01e091e0 hashCodeProvider
0x002d71dc 0x400037d???? 0x1c??????????????? CLASS?? instance 0x00000000 onCollectionChangedDelegate
0x002d71dc 0x400037e???? 0x20??????????????? CLASS?? instance 0x00000000 onCollectionChangingDelegate
0x002d71dc 0x400037f???? 0x24??????????????? CLASS?? instance 0x00000000 onColumnPropertyChangedDelegate
0x002d71dc 0x4000380???? 0x2c?????? System.Boolean?? instance 0 fInClear

查看list
0:003> !do 0x01e090b4
Name: System.Collections.ArrayList
MethodTable 0x79ba2f5c
EEClass 0x79ba3098
Size 24(0x18) bytes
GC Generation: 1
mdToken: 0x02000100? (c:\windows\microsoft.net\framework\v1.1.4322\mscorlib.dll)
FieldDesc*: 0x79ba30fc
??????? MT????? Field???? Offset???????????????? Type?????? Attr????? Value Name
0x79ba2f5c 0x4000362????? 0x4??????????????? CLASS?? instance 0x01e090cc _items
0x79ba2f5c 0x4000363????? 0xc???????? System.Int32?? instance 2 _size
0x79ba2f5c 0x4000364???? 0x10???????? System.Int32?? instance 3 _version
0x79ba2f5c 0x4000365????? 0x8??????????????? CLASS?? instance 0x00000000 _syncRoot

我們知道
0:003> !do -v 0x01e090cc
Name: System.Object[]
MethodTable 0x003f209c
EEClass 0x003f2018
Size 80(0x50) bytes
GC Generation: 1
Array: Rank 1, Type CLASS
Element Type: System.Object
Content: 16 items
------ Will only dump out valid managed objects ----
?? Address?? ???????? MT?? ?Class Name
0x01e0932c?? ?0x002d7bc8?? ?System.Data.DataColumn
0x01e09518?? ?0x002d7bc8?? ?System.Data.DataColumn

----------
所有DataTable的數據都是存放在System.Data.DataColumn中，在System.Data.DataColumn中有一個數組，加上表中有100行數據的話，那么上面這個結合中的每個System.Data.DataColumn都有一個數組來存放這100行的當前列的數據。ok，讓我們接到向下看。
以第一列數據為例
0:003> !do 0x01e0932c
Name: System.Data.DataColumn
MethodTable 0x002d7bc8
EEClass 0x03df0cfc
Size 128(0x80) bytes
GC Generation: 1
mdToken: 0x02000017? (c:\windows\assembly\gac\system.data\1.0.5000.0__b77a5c561934e089\system.data.dll)
FieldDesc*: 0x002d7304
??????? MT????? Field???? Offset???????????????? Type?????? Attr????? Value Name
0x7b308b0c 0x4000583????? 0x4??????????????? CLASS?? instance 0x00000000 site
..............................................
0x002d7bc8 0x4000369???? 0x40??????????????? CLASS?? instance 0x00000000 extendedProperties
0x002d7bc8 0x400036a???? 0x44??????????????? CLASS?? instance 0x00000000 onPropertyChangingDelegate
0x002d7bc8 0x400036b???? 0x48??????????????? CLASS?? instance 0x01e11688 storage
0x002d7bc8 0x400036c???? 0x1c???????? System.Int64?? instance 0 autoIncrementCurrent

數據就存放在storage中。
0:003> !do 0x01e11688
Name: System.Data.Common.StringStorage
MethodTable 0x040562b4
EEClass 0x03dfc674
Size 24(0x18) bytes
GC Generation: 0
mdToken: 0x020000c6? (c:\windows\assembly\gac\system.data\1.0.5000.0__b77a5c561934e089\system.data.dll)
FieldDesc*: 0x04056198
??????? MT????? Field???? Offset???????????????? Type?????? Attr????? Value Name
0x0405557c 0x4000665????? 0x4??????????????? CLASS?? instance 0x01dd43c4 type
0x0405557c 0x4000666????? 0x8??????????????? CLASS?? instance 0x01e08a64 table
0x0405557c 0x4000667????? 0xc??????????????? CLASS?? instance 0x00000000 dbNullBits
0x040562b4 0x4000761???? 0x10??????????????? CLASS?? instance 0x01e116c8 values
0x040562b4 0x4000760???? 0x4c??????????????? CLASS???? static 0x01e116a0 DBNullObject

使用！do -v 查看數組對象

0:003> !do -v 0x01e116c8
Name: System.Object[]
MethodTable 0x003f209c
EEClass 0x003f2018
Size 528(0x210) bytes
GC Generation: 0
Array: Rank 1, Type CLASS
Element Type: System.Object
Content: 128 items
------ Will only dump out valid managed objects ----
?? Address?? ???????? MT?? ?Class Name
0x01e11da4?? ?0x79b946b0?? ?System.String
0x01e11f18?? ?0x79b946b0?? ?System.String
0x01e11ff4?? ?0x79b946b0?? ?System.String
0x01e120d0?? ?0x79b946b0?? ?System.String
0x01e121ac?? ?0x79b946b0?? ?System.String
0x01e12288?? ?0x79b946b0?? ?System.String
0x01e12364?? ?0x79b946b0?? ?System.String
0x01e12440?? ?0x79b946b0?? ?System.String
0x01e1251c?? ?0x79b946b0?? ?System.String
0x01e125f8?? ?0x79b946b0?? ?System.String
0x01e126d8?? ?0x79b946b0?? ?System.String
0x01e127bc?? ?0x79b946b0?? ?System.String
...........................
順便找個數據來看看呢
0:003> !do 0x01e11da4
String: Test0

終于找到了他了吧。

轉載于:https://www.cnblogs.com/jingzy/archive/2009/08/04/1538882.html

總結

以上是生活随笔為你收集整理的通过Windbg查看DataTable的值的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。