RSCG- part 13 – IFormattable
| name | IFormattable |
| nuget |
https://www.nuget.org/packages/AOPMethodsCommon/ |
| link | http://msprogrammer.serviciipeweb.ro/category/roslyn/ |
| author | Andrei Ignat |
This will generate code to add IFormattable to any class, based on the properties of the class
The code that you start with is
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | [AutoMethods(CustomTemplateFileName = "CreateFormattable.txt", template = TemplateMethod.CustomTemplateFile)] partial class Department{ public int ID { get; set; } public string Name { get; set; }}[AutoMethods(CustomTemplateFileName = "CreateFormattable.txt", template = TemplateMethod.CustomTemplateFile)]partial class Employee{ public int ID { get; set; } public string Name { get; set; } public Department dep { get; set; } } |
The code that you will use is
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | var e = new Employee();e.ID = 1;e.Name = "Andrei";e.dep = new Department();e.dep.Name = "IT";Console.WriteLine(e.ToString("for employee with id = {id} the name is {name} and department is {dep?.Name}", null)); e.dep = null;Console.WriteLine(e.ToString("for employee with id = {id} the name is {name} and department is {dep?.Name}", null)); |
The code that is generated is
001 002 003 004 005 006 007 008 009 010 011 012 013 014 015 016 017 018 019 020 021 022 023 024 025 026 027 028 029 030 031 032 033 034 035 036 037 038 039 040 041 042 043 044 045 046 047 048 049 050 051 052 053 054 055 056 057 058 059 060 061 062 063 064 065 066 067 068 069 070 071 072 073 074 075 076 077 078 079 080 081 082 083 084 085 086 087 088 089 090 091 092 093 094 095 096 097 098 099 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 | [GeneratedCode("AOPMethods", "2021.2.27.640")] [DebuggerDisplay(" ID = {ID} Name = {Name} dep = {dep}")]partial class Employee: IFormattable{ public object ValueProperty(string val){ val = val.Replace("?",""); if(string.Compare("ID",val,StringComparison.CurrentCultureIgnoreCase)==0) { return this.ID; } if(string.Compare("Name",val,StringComparison.CurrentCultureIgnoreCase)==0) { return this.Name; } if(string.Compare("dep",val,StringComparison.CurrentCultureIgnoreCase)==0) { return this.dep; } throw new ArgumentException("cannot find "+ val); } private object Eval(string expression,IFormatProvider formatProvider) { if (expression.Contains(".")) { var splut = expression.Split("."); bool canBeNull=splut[0].Contains("?"); dynamic d = ValueProperty(splut[0]); if(canBeNull && d == null) return null; for(var i=1; i<splut.Length;i++){ canBeNull=splut[i].Contains("?"); d=d.ToString("{"+splut[i]+"}",formatProvider); if(canBeNull && d == null) return null; } return d; } return ValueProperty(expression); } public string ToString(string format, IFormatProvider formatProvider) { if (format == null) throw new ArgumentNullException("format"); List<object> values = new List<object>(); string rewrittenFormat = Regex.Replace(format, delegate (Match m) { Group startGroup = m.Groups["start"]; Group propertyGroup = m.Groups["property"]; Group formatGroup = m.Groups["format"]; Group endGroup = m.Groups["end"]; values.Add((propertyGroup.Value == "0") ? this : Eval(propertyGroup.Value, formatProvider)); int openings = startGroup.Captures.Count; int closings = endGroup.Captures.Count; return openings > closings || openings % 2 == 0 ? m.Value : new string('{', openings) + (values.Count - 1) + formatGroup.Value + new string('}', closings); }, RegexOptions.Compiled | RegexOptions.CultureInvariant | RegexOptions.IgnoreCase); return string.Format(formatProvider, rewrittenFormat, values.ToArray()); }} |
Example Code: https://github.com/ignatandrei/RSCG_Examples/tree/main/IFormattable
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