il code swtich

  public enum RangeItemType
    {

        CompanyPicker = 1,              //公司STR_COMPANY
        BrDivPicker = 2,                //分行STR_BRDIV
        DepartPicker = 3,               //部门STR_DEPARTMENT
        SectionPicker = 4,              //科组STR_SECTION
        PositionPicker = 5,             //职位STR_POSITION
        CategoryPicker = 6,             //级别STR_CATEGORY
        StaffPicker = 7,                //雇员STR_STAFF
        GradePicker = 8,                //职级STR_GRADE
        RankPicker = 9,                 //职阶STR_RANK
}

 switch (key)
            {
                #region Range控件
                case RangeItemType.StaffPicker:             //雇员
                case RangeItemType.CompanyPicker:           //公司
                case RangeItemType.BrDivPicker:             //分行
                case RangeItemType.DepartPicker:            //部门
                case RangeItemType.SectionPicker:           //科组
                case RangeItemType.PositionPicker:          //职位
                case RangeItemType.CategoryPicker:          //级别
                case RangeItemType.GradePicker:             //职级
                case RangeItemType.RankPicker:              //职阶
                case RangeItemType.ContractTermsPicker:     //合约条件
                case RangeItemType.PayTermsPicker:          //支薪条件
                case RangeItemType.MedBenefitPolicyPicker:  //医疗福利政策
                case RangeItemType.OrgLevel1Picker:         //组织层级1
                case RangeItemType.OrgLevel2Picker:         //组织层级2
                case RangeItemType.OrgLevel3Picker:         //组织层级3
                case RangeItemType.OrgLevel4Picker:         //组织层级4
                case RangeItemType.OrgLevel5Picker:         //组织层级5
                case RangeItemType.OrgLevel6Picker:         //组织层级6
                case RangeItemType.OrgLevel7Picker:         //组织层级7
                case RangeItemType.OrgLevel8Picker:         //组织层级8
                case RangeItemType.OrgLevel9Picker:         //组织层级9
                case RangeItemType.OrgLevel10Picker:        //组织层级10
                case RangeItemType.OrgLevel11Picker:        //组织层级11
                case RangeItemType.OrgLevel12Picker:        //组织层级12
                case RangeItemType.OrgUnitPicker:        //组织层级12
                    _returnVal = RangeClassType.RangePicker;
                    break;

　　生成 il

IL_0010: ldloc.2
IL_0011: ldc.i4 11013
IL_0016: bgt IL_00a4

IL_001b: ldloc.2
IL_001c: ldc.i4.1
IL_001d: sub
IL_001e: switch (IL_0116, IL_0116, IL_0116, IL_0116, IL_0116, IL_0116, IL_0116, IL_0116, IL_0116)

。。。。。。

IL_0116: ldc.i4.1
IL_0117: stloc.0
IL_0118: br.s IL_012a

感觉用Sub和Switch很神奇

改成 CategoryPicker 单独 拿出来

switch (key)
			{
			case RangeItemType.CompanyPicker:
			case RangeItemType.BrDivPicker:
			case RangeItemType.DepartPicker:
			case RangeItemType.SectionPicker:
			case RangeItemType.PositionPicker:
			case RangeItemType.StaffPicker:
			case RangeItemType.GradePicker:
			case RangeItemType.RankPicker:
				break;
			case RangeItemType.CategoryPicker:
				return result;

　　

il 就生成了

IL_001e: switch (IL_0116, IL_0116, IL_0116, IL_0116, IL_0116, IL_012a, IL_0116, IL_0116, IL_0116)

就变了一个  IL_012a,

不过 RangeItemType 项目 编号不连续的话，就会就变成两个 Swtich

另外 dotPeek反编译出来比较对，和源码一样。

ilspy 反编译出来变成 switch和if互相套用，有点乱