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 我们用wndbg调试时,很多时候需要查看某个控件的依赖属性值。 **比如:我们查看DataGridColumnHeader的Content依赖属性** **** **1.我们用到的windbg的命令有:!do, !da -details, .formats ** **2.利用!do查看依赖对象的成员变量, 找到具体依赖属性的地址** 0:000> !do 00000000039a71d8 Name:        System.Windows.Controls.Primitives.DataGridColumnHeader MethodTable: 000007fee7e58090 EEClass:     000007fee7885bd8 Size:        384(0x180) bytes File:        C:\Windows\Microsoft.Net\assembly\GAC_MSIL\PresentationFramework\v4.0_4.0.0.0__31bf3856ad364e35\PresentationFramework.dll Fields:             MT    Field   Offset                 Type VT     Attr            Value Name 000007fef3f2eb00  4000db0        8 ...eading.Dispatcher  0 instance 0000000002dd4e68 _dispatcher 000007fef3f3bb88  4001321       10 ...endencyObjectType  0 instance 000000000308a530 _dType 000007fef7825ac8  4001322       18        System.Object  0 instance 0000000000000000 _contextStorage 000007fef3f3e898  4001323       20 ...ctiveValueEntry[]  0 instance 00000000042efb08 _effectiveValues 000007fef7847b70  4001324       28        System.UInt32  1 instance          3680277 _packedData 000007fef3f33708  400131f      7c0 ...ependencyProperty  0   static 0000000002dd5ef0 DirectDependencyProperty ---------------------省略部分---- 000007fef3f33708  40002ca      950 ...ependencyProperty  0   static 0000000002dfd820 ContentProperty 0000000000000000  40002cb      958                       0   static 0000000002dfd908 HasContentPropertyKey 000007fef3f33708  40002cc      960 ...ependencyProperty  0   static 0000000002dfd948 HasContentProperty 000007fef3f33708  40002cd      968 ...ependencyProperty  0   static 0000000002dfdb00 ContentTemplateProperty 000007fef3f33708  40002ce      970 ...ependencyProperty  0   static 0000000002dfdc80 ContentTemplateSelectorProperty **3.利用!do命令查看依赖属性的成员变量值, 比如:** 0:000> !do 0000000002dfd820 Name:        System.Windows.DependencyProperty MethodTable: 000007fef3f33708 EEClass:     000007fef3dd7550 Size:        88(0x58) bytes File:        C:\Windows\Microsoft.Net\assembly\GAC_MSIL\WindowsBase\v4.0_4.0.0.0__31bf3856ad364e35\WindowsBase.dll Fields:             MT    Field   Offset                 Type VT     Attr            Value Name 000007fef7826970  400133c        8        System.String  0 instance 0000000002dfd630 _name 000007fef78282f8  400133d       10          System.Type  0 instance 0000000002d444b0 _propertyType 000007fef78282f8  400133e       18          System.Type  0 instance 0000000002dfab80 _ownerType 000007fef3f312a8  400133f       20 ....PropertyMetadata  0 instance 0000000002dfd7c0 _defaultMetadata 000007fef3f31088  4001340       28 ...dateValueCallback  0 instance 0000000000000000 _validateValueCallback 000007fef3f3e750  4001341       30 ...ndencyPropertyKey  0 instance 0000000000000000 _readOnlyKey 000007fef4194818  4001342       40         System.Int32  1 instance          4194530 _packedData 000007fef3f3e408  4001343       48 ....InsertionSortMap  1 instance 0000000002dfd868 _metadataMap 000007fef3f30fc8  4001344       38 ...erceValueCallback  0 instance 0000000000000000 _designerCoerceValueCallback 000007fef7825ac8  400133b      808        System.Object  0   static 0000000002d72000 UnsetValue 000007fef3f3c6c0  4001345      800 ...ty, WindowsBase]]  1   static 0000000012d5bb10 RegisteredPropertyList 000007fef7831c38  4001346      810 ...ections.Hashtable  0   static 0000000002d6f3d8 PropertyFromName 000007fef782c858  4001347      5c8         System.Int32  1   static              868 GlobalIndexCount 000007fef7825ac8  4001348      818        System.Object  0   static 0000000002d6f430 Synchronized 000007fef78282f8  4001349      820          System.Type  0   static 0000000002d68808 NullableType **4.利用.formats 得到依赖属性, 分2步** 1)利用.formats 0n得到_packedData十六进制 2)   去掉高位,Decimal描述的就是依赖属性在依赖对象中的存储索引 如下: 0:000> .formats 0n4194530 Evaluate expression: Hex:     00000000`004000e2 Decimal: 4194530 Octal:   0000000000000020000342 Binary:  00000000 00000000 00000000 00000000 00000000 01000000 00000000 11100010 Chars:   .....@.. Time:    Wed Feb 18 21:08:50 1970 Float:   low 5.87779e-039 high 0 Double:  2.07237e-317 0:000> .formats 00e2 Evaluate expression: Hex:     00000000`000000e2  Decimal: 226 Octal:   0000000000000000000342 Binary:  00000000 00000000 00000000 00000000 00000000 00000000 00000000 11100010 Chars:   ........ Time:    Thu Jan 01 08:03:46 1970 Float:   low 3.16693e-043 high 0 Double:  1.11659e-321 可知ContentProperty依赖属性在DataGridColumnHeader中的索引为226 **5. 根据第4步的index,从第2步依赖对象的_effectiveValues 得到依赖属性的具体值,分3步:** 1)利用!da -details 查看_effectiveValues 数组所有元素的值 2)查看每个元素,根据_propertyIndex (即第4步得到的Decimal值)确定依赖属性 3)利用!do命令查看元素的_value成员的值 比如: 0:000> !da -details 00000000042efb08 Name:        System.Windows.EffectiveValueEntry[] MethodTable: 000007fef3f3e898 EEClass:     000007fef3e0c8a0 Size:        408(0x198) bytes Array:       Rank 1, Number of elements 24, Type VALUETYPE Element Methodtable: 000007fef3f36120 [0] 00000000042efb18   Name:        System.Windows.EffectiveValueEntry   MethodTable: 000007fef3f36120   EEClass:     000007fef3dd8c90   Size:        32(0x20) bytes   File:        C:\Windows\Microsoft.Net\assembly\GAC_MSIL\WindowsBase\v4.0_4.0.0.0__31bf3856ad364e35\WindowsBase.dll   Fields:                     MT    Field   Offset                 Type VT     Attr            Value Name       000007fef7825ac8  400136e        0            System.Object      0     instance     0000000002e1c5d8     _value       000007fef7830940  400136f        8             System.Int16      1     instance                    3     _propertyIndex       000007fef41949d0  4001370        a             System.Int16      1     instance                    2     _source --------------------------------省略部分------------------------------ [15] 00000000042efc08   Name:        System.Windows.EffectiveValueEntry   MethodTable: 000007fef3f36120   EEClass:     000007fef3dd8c90   Size:        32(0x20) bytes   File:        C:\Windows\Microsoft.Net\assembly\GAC_MSIL\WindowsBase\v4.0_4.0.0.0__31bf3856ad364e35\WindowsBase.dll   Fields:                     MT    Field   Offset                 Type VT     Attr            Value Name       000007fef7825ac8  400136e        0            System.Object      0     instance     00000000042efca0     _value       000007fef7830940  400136f        8             System.Int16      1     instance                  226     _propertyIndex       000007fef41949d0  4001370        a             System.Int16      1     instance                   65     _source 可知ContentProperty为_effectiveValues的第16个元素, 其值存储在_value中  0:000> !do 00000000042efca0     Name:        System.Windows.ModifiedValue MethodTable: 000007fef3f40d58 EEClass:     000007fef3e0d000 Size:        48(0x30) bytes File:        C:\Windows\Microsoft.Net\assembly\GAC_MSIL\WindowsBase\v4.0_4.0.0.0__31bf3856ad364e35\WindowsBase.dll Fields:             MT    Field   Offset                 Type VT     Attr            Value Name 000007fef7825ac8  4001387        8        System.Object  0 instance 0000000000000000 _baseValue 000007fef7825ac8  4001388       10        System.Object  0 instance 0000000000000000 _expressionValue 000007fef7825ac8  4001389       18        System.Object  0 instance 0000000000000000 _animatedValue 000007fef7825ac8  400138a       20        System.Object  0 instance 0000000002d93618 _coercedValue **6.根据第5步中的成员_coercedValue得到依赖属性的具体值,大功告成!** 0:000> !do 0000000002d93618 Name:        System.String MethodTable: 000007fef7826970 EEClass:     000007fef73aeec8 Size:        36(0x24) bytes File:        C:\Windows\Microsoft.Net\assembly\GAC_64\mscorlib\v4.0_4.0.0.0__b77a5c561934e089\mscorlib.dll String:      导入数据源 Fields:             MT    Field   Offset                 Type VT     Attr            Value Name 000007fef782c858  40000ed        8         System.Int32  1 instance                5 m_stringLength 000007fef782b398  40000ee        c          System.Char  1 instance             5bfc m_firstChar 000007fef7826970  40000ef       10        System.String  0   shared           static Empty                                >> Domain:Value  00000000007f85a0:0000000002d41420 <<