维护没有源代码,float改成double

时间:2024-05-17 17:04:26
	float f= 931340.31f;
Console.WriteLine(f.ToString("#,###,##0.00"));

返回 931,340.30 ,float 10w以上2位小数,就会掉精度,改成double,没有源代码  

ilasm和ildasm要相同Framework才行 framework2反编译的,不能用1.1编译通过

1.1的代码 ,没装vs2003 ,ildasm 在 sc_vs.net_2003_enar_cd2.iso

\Program Files\Microsoft Visual Studio .NET 2003\SDK\v1.1\Bin 下,单独解压可以用

Model.Common,Data.Common,WebHr,Web.PageControl ,找到所有BasicSalary 关键字 float32改成float64 (这个double )

附近Null2Float改成Null2Double,NullFloat改成NullDouble

Model.Common 缺NullDouble 方法

在NullFloat附近添加

    .method public hidebysig static float64
NullDouble(object 'value') cil managed
{
// 代码大小 16 (0x10)
.maxstack 2
IL_0000: ldarg.0
IL_0001: ldc.r8 0.0
IL_000a: call float64 Penseesoft.Web.Model.Utility.NullUtil::NullDouble(object,
float64)
IL_000f: ret
} // end of method NullUtil::NullDouble .method public hidebysig static float64
NullDouble(object 'value',
float64 defaultValue) cil managed
{
// 代码大小 38 (0x26)
.maxstack 1
.locals init (float64 V_0)
IL_0000: ldarg.0
IL_0001: call bool Penseesoft.Web.Model.Utility.NullUtil::IsNullObject(object)
IL_0006: brfalse.s IL_000c IL_0008: ldarg.1
IL_0009: stloc.0
IL_000a: br.s IL_0024 .try
{
IL_000c: ldarg.0
IL_000d: call float64 [mscorlib]System.Convert::ToDouble(object)
IL_0012: stloc.0
IL_0013: ldloc.0
IL_0014: call bool [mscorlib]System.Double::IsNaN(float64)
IL_0019: brfalse.s IL_001d IL_001b: ldarg.1
IL_001c: stloc.0
IL_001d: leave.s IL_0024 } // end .try
catch [mscorlib]System.Exception
{
IL_001f: pop
IL_0020: ldarg.1
IL_0021: stloc.0
IL_0022: leave.s IL_0024 } // end handler
IL_0024: ldloc.0
IL_0025: ret
} // end of method NullUtil::NullDouble

  

callvirt instance float32 [Model.Common]Penseesoft.Web.Model.StaffInfo::get_BasicSalary()
stloc.s V_9
 ldloca.s V_9
 ldstr "#,##0.00"
call instance string [mscorlib]System.Single::ToString(string)

另外.net调用过程,压堆栈,会压一个变量 V_9

变量申明在 函数申明后

.locals init (int32 V_0,
class [System.Web]System.Web.UI.WebControls.Panel V_1,
class [Model.Common]Penseesoft.Web.Model.StaffInfo V_2,
class [Model.Payroll]Penseesoft.Web.Model.Payroll.PayTermsInfo V_3,
int32 V_4,
class [System.Data]System.Data.DataRow V_5,
class [System.Web]System.Web.UI.WebControls.Panel[] V_6,
int32 V_7,
valuetype [mscorlib]System.DateTime V_8,
float32 V_9,
float64 V_10)

如果本来V_9 是float32,方法改成double,如果不新增float64 V_10 ,改成V_10的话,float, ilasm可以编译过,运行会出一个很大数字。

ilspy + Reflexil ,有Verfiy菜单项可以用下,看编译的dll是否有问题

bat文件

set ilasm=%windir%\Microsoft.NET\Framework\v1.1.4322\ilasm /dll /QUIET

%ilasm% Web.PageControls.il /res:Web.PageControls.res
%ilasm% WebHr.il /res:WebHr.res
%ilasm% Data.Common.il /res:Data.Common.res
%ilasm% Model.Common.il /res:Model.Common.res

pause