嗨,没法说,EF4的TT模版加上注释后,升级到EF5的TT模版后,注释就不通用了,所以,还得再研究一下,然后把操作方法再分享出来,没辙的微软!

T4模版可能有些凌乱,这在T5模版里有了不错的改进,但我希望解决的问题在T5里并没有得到解决,那就是TT类文件自动得到EDMX模型的注释问题,可能大微的开发人员不需要实体注释吧,嗨!

1 先加上类注释

找到这行代码WriteHeader(codeStringGenerator, fileManager);

在它下面加上我们的代码:

string summary=string.Empty;
foreach (var entity in typeMapper.GetItemsToGenerate<EntityType>(itemCollection))
{
fileManager.StartNewFile(entity.Name + ".cs");
BeginNamespace(code);
if(entity.Documentation !=null && entity.Documentation.Summary!=null)
summary=entity.Documentation.Summary;
else
summary=entity.Name;
#>
<#=codeStringGenerator.UsingDirectives(inHeader: false)#>
/// <summary>
/// <#=summary#>
/// </summary>
<#=codeStringGenerator.EntityClassOpening(entity)#>

同时保存TT模版文件,这时类的注释就已经加上了

aaarticlea/png;base64,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" alt="" />

2 再加上属性注释

找到这行代码   foreach (var edmProperty in simpleProperties)

在它下面加上我们的代码

  foreach (var edmProperty in simpleProperties)
{
if (edmProperty.Documentation != null && edmProperty.Documentation.Summary != null)
{
summary=edmProperty.Documentation.Summary;
}
else
{
summary="";
}
#>
/// <summary>
/// <#=summary#>
/// </summary>
<#=codeStringGenerator.Property(edmProperty)#>

同时保存TT模版,这时我们的类属性注释就加好了

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ySIe+7gRU/XsmQ9wEPTUJiGU/EuWPRipV7xbonvxWMjVmfbVk/00CIZVwnE8UyenasiZnxd81addZUmmI+6qpyFnbKB9ans7lPMmxr3G/F7HvIGhTXDAp/2lZGc5i2y2AbAs7JPyX8Zr8fZJ+lZjGfYaD6uCAZ18jEjgkYIkQy2vbXGAvIJuDxzWkYMRAk4zqBZFwxIa9ytSXD5yYMoF61vIBejBwIr3JdKZCMqybk1WnbXzjIxLg68ML4NXPVb38CAK4NSAYAYASQDADACCAZAIARTCoZF0tQAAA4EVNKhjPlT3ghAODyTCgZVirTQwrd2NnSrhBoH5g700nGrpuXdFyhC0dO1sikPlTF7ozNaZ5nscqPqBMvOgvJyqVoJ0ksNlGWm7Hq/IzNTKp83fyE9Ktg1kwlGVW+7hsO4YV9iizurkRXVlRPkvcoK551D0361V5hZ152kvdGk/Sg7nTwuimSvIPZMpFkOPOShhd2qPI0cmQt1MmZWxaKRzKCMzarJMyRZVCQJ2OzSSLtdkZ2WRSFelsAXA/TSIZvjQUWOrvM4sjtv6hFrr86UjLctoN7klWepnllj2i+gZUBZssUkqHX0qGFfrxhgmZ5mzVf5Wsr7hAoGVWe1qZBsdljZRBRsUnzvBuIQSwDzJoJJMNY7IcVDmM9MVGi0A1Vam9FhTXj0Y6JCX+a5jRgCu2yqO0x4YkJmDsXl4wX9fpWSCAGgFmBF8bPR5HFgYEYAGYDJOMsKP8FFgZYHpAMAMAIIBkAgBEsSDKqhKeJvbGk3DDhCCWUyZoneIcKgINYpmSUj1x8lyJu77WrKyjJkCJmLOp92qIDAOiwiP0yqoRby17kCc8k7UR3/bckoyn2GCMAAAcL2i9DK4IUaVISyU3bfPgkgyWjY4AI+Uy0E90SAF4kS9gvo6sOERPfpYi1LpSPXCtCWzLKR95zTGwpafs1ls1SPnKoBnixLGm/jDJZa3uhfORm/TdGRE8yeF5aFTrWh1cy1ECqLQAvjSXsl9G1F1IhUpHkvBaCeuWfTDJIbiAZ4IWyhP0y5MY86Wj8EaoSnkn9L9UlkAwAjmMx+2WQ8hfqWAYRkdwIkVnLvh0fPdIxwUMW8DJZwn4ZlmPSWfONfLQqf5J0hGTIDR6agJfLovbLkBvLK9HyUSZrpjRCVWk8l6YVE5mwnp7ue8iK173AC2Yh+2XUz1mFfKbykXdWtbEsnDEIvMoFQDgLemEcAHB+IBkAgBFAMgAAI4BkAABGAMkAAIwAkgEAGMEi9ss4bCAAwHgWtF/GyIEAAAewhP0ybKxsaYc0nwQoGpgRS9ovw5PutNO8ytPIJElUdd25ndM8z2KVSVGnaHQWkpV10U6nWGyiLDdj1Zkcm+lV+br5CYlawVxYwn4ZRKRSk7kWXbe5609jPengo6x41t02iVp7hZ3R7HTwjSbpQd2J43VTpIMHc2AJ+2Uow8GbSLndXKdxbpktHskIzu2s0jVHlkFB/r/lV03czsgui6Kr9qEAWMx+GUUWR33/ZTgne13/SMlw2w7uofWf81sjmm9gZYA5sIT9MgzdiMBw82Z5mzVf5Wsr7hAoGVWe1qZBsdljZRBRsUnzvBudQSwDzIVF7ZdB7ScmruZKFLqhSu2tqLBmPNoxMeFP05z2GTj2V3hiAmbEQvbLCB3oGgiJzgBwreCF8QtTZHH4bqYAXB2QjMuh/BdYGGDWQDIAACOAZAAARgDJAACMAJIBABjBVUuGWFE/w5C8J8aIMRJ/tb94In7TKzw1X7efb99/vn3/+e0/ewpd/Hz74dvX3hEFN/dzkWM/A1Kspk8iJe8ZY4y9kfurLojygR921POTDEVydzrJKL/dvv/8+n+/iYjo98c/9y5dZ52Qhm7JCG7uJ/jYHectDH2FWfB3x2eAOlIypFjZMxLymWgruiXDPCX85sSydfBJvvhAUqx48u+4NguSjIMpv93+8eX1H7sfRHORjPKBH3ZX7J+38oGPWfyntQtO0lu7k61gr5LymUjL3L7+rfqnYj6SQfKeje1hAskQK0oS7Vzwd02h/tU+Eb/R/xcrkrJbU9E5WT5vxZQz5lUfKr/d/rH7+veXt/+QtXSt5f1r9/q9vdSDJMO4G5bH8fPth29f//2mCmu7xtPnr93rbnNzUMy+yp3H3j/J5UNzKtTH3F46HQ7SW+RPCb+p7+n1BLSp3y5sl9e5LFdCStE1Wzx9isSU23PwSgZRmdzts4YCJWPbOnX6anwiftM6+QMnWZk/+9en1WdzzZ9jICKakWSwN0SkT4Q6VJ9k9GsqnPrq0JE3ARMqv93+sfvxa/da/jyhZDQ0zX++/fD5Vv6sC798/OVrbtsjP99+MDWlWLnXQOfYm1O3bcml774UdEPWE/AtV5eVa5n98r7vOUuxqgu3oqUjvT5tXWtf6AOSQfI+QDIC7DWxqi+/LbFXVJpb2nOvgu8kh61kee9oe46B6uFGO5jTSEb/CvZaGZ5rPUQy7JM7hJIMoq/bLx9/nU4yym/GyrhtJMP006nf/tEyMW7ff75V4vKU8BvvpdA/9v757FdrsRWM7fVs2+vTMgeUoVCvq35Awek2W70ZcfH06b8fHiwZlmDtwyEZ1p2/c58/xl/Q5oN9qzvPQNaIPOD33gDJaCSDym+3cnciybBMg5aVESYZZkpdvFf5kZJxoJXhtuotdWisjGDJ8HgKB0lGmdztud8GRoVsD7dvbnQ4wUreWsJxzoHmZmVYNrNZ3sldq7BfUxEiGcndGMeEiOj3xz+/vP7DSIZa878//mnMBEWAZFh+x9ety8oovw32+fPtB2801Bl6CJQMed+NCvk69NB3THpr8inhN5Y3oZWoTO6cjklPMpx9HiQZ1uh+QmIZT8S5Y9GKlXvFOk+ysrxGrM/2vfNMA80nltEzsUw4h79rLndnTaUp5qMO2FnYKR8Of/4w/6/DjT/+/lLHKXf1Ulfy0YlrOgub8KfV/OfbD21fg7zNW75Jz+Kw743OY/dJhm3lqlN67BMT249orVUV0Uys+mVy5wp/diXD22fv4t73kDUorhkU/rStjOZasl0G2xDoneTmoPZZNPZvszneMwxUH9dMJGPyt3cA0IRIRtvIdd/b9xPw+OY0jBgIkgHASEJe5WpLhs9NGEC9CHcBvRg50Exe5YJkgKsi5NVp2184yMS4Opb5wjgA4NqAZAAARgDJAACMAJIBABjBpJJxsQQFAIATMaVkOFP+hBcCAC7PhJJhpTI9pNCNnS3tCoH2gbkznWTsunlJxxW6cORkjUzqQ1Xsztic5nkWq/yIOvGis5CsXIp2ksRiE2W5GavOz9jMpMrXzU9IvwpmzVSSUeXrvuEQXtinyOLuSnRlRfUkeY+y4ln30KRf7RV25mUneW80SQ/qTgevmyLJO5gtE0mGMy9peGGHKk8jR9ZCnZy5ZaF4JCM4Y7NKwhxZBgV5MjabJNJuZ2SXRVGotwXA9TCNZPjWWGChs8ssjtz+i1rk+qsjJcNtO7gnWeVpmlf2iOYbWBlgtkwhGXotHVroxxsmaJa3WfNVvrbiDoGSUeVpbRoUmz1WBhEVmzTPu4EYxDLArJlAMozFfljhMNYTEyUK3VCl9lZUWDMe7ZiY8KdpTgOm0C6L2h4TnpiAuXNxyXhRr2+FBGIAmBV4Yfx8FFkcGIgBYDZAMs6C8l9gYYDlAckAAIwAkgEAGMGCJKNKeJrYex7KDROOUEKZrHky/A5VlfCsu8FZ+chdvemvWHtoAJbKMiWjfOTiuxRxextYXUFJhhQxY1Hvo3rYCZ4bBdAS45WMnWDRPg0CYCksYr+MKuHWshd5wjNJO9G987ckoynuGyNtddDS45aMnXDoTsRYxCzRAWA5LGi/DK0IUqRJSSQ37TX8SYZJRtv6+CSdoqDkQA3hkIa+WgGwFJawX0ZXHSImvksRa11orIO2ZJSPvKcFqkmZrIV8JtoJ9ilJ1lpQOlZG+chZZKrJ1mQ+jd7oHYC5sKT9Mkp7eZv4QmNE9CTDGAviO1lhUW2n0E7wTPBIB0T2hD8jIQvBImfAFYDlsIT9Mrr2QipEKpKc10JQB0EDJaOOfXZiHAOSoYMpMC7AC2AJ+2XITf2kgxp/RD8otR+XhklG7Vlorel7PbYp4fJuEP4ES2Yx+2WQckzsJS03QmTWc9Z2fNTvmNRC0LYaOlaGjn2m3GlcmM4BWBhL2C/DutXbj0L0s4/+A1S1yAcko27berDifcgKyQAviUXtlyE3llfSPP6w7QXLc2laMZGpJ6nKJJEiZuK76qQxUvBeBgC0mP0y6oiDfueq81qEsSzkxrGS22HO9lsb7ZfEWu9rKGBlgBfGgl4YBwCcH0gGAGAEkAwAwAggGQCAEUAyAAAjgGQAAEawiP0yDhsIADCeBe2XMXIgAMABLGG/DBsrW9ohzScBigZmxJL2y/CkO+00r/I0MkkSVV13buc0z7NYZVLUKRqdhWRlXbTTKRabKMvNWHUmx2Z6Vb5ufkKiVjAXlrBfBhGp1GSuRddt7vrTWE86+CgrnnW3TaLWXmFnNDsdfKNJelB34njdFOngwRxYwn4ZynDwJlJuN9dpnFtmi0cygnM7q3TNkWVQkP9v+VUTtzOyy6Loqn0oABazX0aRxVHffxnOyV7XP1Iy3LaDe2j95/zWiOYbWBlgDixhvwxDNyIw3LxZ3mbNV/naijsESkaVp7VpUGz2WBlEVGzSPO9GZxDLAHNhUftlUPuJiau5EoVuqFJ7KyqsGY92TEz40zSnfQaO/RWemIAZsZD9MkIHugZCojMAXCt4YfzCFFkcvpspAFcHJONyKP8FFgaYNZAMAMAIIBkAgBFAMgAAI4BkAABGcNWSIVYke09J5T0xRoyR+Kv9xRPxm17hxZh29CCkWIn++bxa5D1jjLE3LyvTbfnAr/yo5ycZiuTuEpLhGMXHSUfX140Ff3d8VpTjJGMrrGmUyR07rz4+JfzmxAI34rc58UBSrHjy76mmc2IWJBln4GIXmYfT2gVHS8YrznlSPtMlJGMr2Cs11smYj2SQvD/z6T2CCSRDrChJtHPB3zWF+mp+In6j/y9WJGW3pqLzW/F5K6acMa/6mEHtgcqHpqH6KNWX9ySSprLq0zm68zBp2+qzc1A9eov8KeE32u4wY2kDvl3YLq8TR66ElKJrtnj6FIkpF/JZr2H5f1z8RbZk9EcvHzh/l4gVY6+S5P9Z3boG8hIoGc7zaf026ym5f5t6oJD59K6Qcw1ERJCMDmJF7A0R6TOuzqlPMvo1FU4hd+jIm6ApyXv3baE/irwn9orKZ0erTuVm8ttGXMSqPopt08/AvNqSYf/osl0tY17e9/1hKVZ14Va0dKTXp7xnZsXqy1et4TLhQrqtjHr08oEzJuSzFCvG35XlA+fvyv2T77AVIf6883zaxmlTwXfzD1vJzivkHAPVw53EFT0L00iGOdHm5HqtjF5N54/OQvu3OIy+OfT0xSkZvt96f3TnER0uGdZdWhkKdVfCKjRC0F+TVm9GXDx9Ou5y9W1f3vPkX0syeqOXD5y9kWYOWjJ8k3cfdWj8z3E+rTt/5z5/jL/guELOM5A1Ih88S5MBybDYdi+Lk0uG7SgFzK0tGW5b3VKHxsoIlgyP/T8gGbQV7E1SS4ZjdLdkjIxN1J3swXE+/Vp8gpVsXyHnHAhWRotmLbks9uSuVdivqQiRjOQu1DFpsJY3Ecn7brjhKMl4Is73What0XqOidMdsLwJbWWUyZ3TMelJhrPPYcmgMrnjnDPxl3t0t2R4BvISIjGe8ylW7t9R/7epBxr1QKp9SzvTQIhltBArx53WxI34u2axOWsqTTEfdWadhZ3ygfCnXa31q7KMzyb86ZKq/uh7rYw9EVmi4fCnHWuoI5qJVb9M7lzhz65kePv0S0bLLe+P7pEM90BewqwS9/m0XQbbEOj9NptZ7bNo3FfIGQaqjwuSYTHw6HThtG0l970IKEIk4zTns0zuLuMFjBgIktECkvhO9u8AAAGeSURBVKHwmbWAKOxVrqPPp3pl7gJ6MXIgvMrV5uVKRtu+hYkxTMir08s7n3hhHACwKCAZAIARQDIAACOAZAAARjCpZFwsQQEA4ERMKRnOlD/hhQCAyzOhZFipTA8pdGNnS7tCoH1g7kwnGbtuXtJxhS4cOVkjk/pQFbszNqd5nsUqP6JOvOgsJCuXop0ksdhEWW7GqvMzNjOp8nXzE9KvglkzlWRU+bpvOIQX9imyuLsSXVlRPUneo6x41j006Vd7hZ152UneG03Sg7rTweumSPIOZstEkuHMSxpe2KHK08iRtVAnZ25ZKB7JCM7YrJIwR5ZBQZ6MzSaJtNsZ2WVRFOptAXA9TCMZvjUWWOjsMosjt/+iFrn+6kjJcNsO7klWeZrmlT2i+QZWBpgtU0iGXkuHFvrxhgma5W3WfJWvrbhDoGRUeVqbBsVmj5VBRMUmzfNuIAaxDDBrJpAMY7EfVjiM9cREiUI3VKm9FRXWjEc7Jib8aZrTgCm0y6K2x4QnJmDuXFwyXtTrWyGBGABmBV4YPx9FFgcGYgCYDf8fq8Vk01dbkAEAAAAASUVORK5CYII=" alt="" />

事实上,这TT模版加注释的原理就是通过读EDMX文件(是个XML文件)的相关注释内容来为POCO实体类加注释的,如果EDMX里没有注释,这个数据库注释也无法加上来,相关数据库与EDMX注释同步文章,可以看这篇文章EF架构~将数据库注释添加导入到模型实体类中

转载自:https://www.cnblogs.com/zhaopei/articles/4733567.html

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