JAVA高级面试进阶训练营视频教程

admin

目前用到了EF5进行模型创建，发现从数据库生成过来的实体中并没有包含字段的说明信息（鄙视下微软，这么简单的问题都不给解决下，太粗枝大叶了），网上找到了EFTSQLDocumentation.Generator.exe的相关方法，但按照操作后，死活没有字段说明信息，只好看其源码，最终发现是xmlns的命名空间不对导致的，程序中给写死了，没法用。自己就哪来修改下，变成可视化直接操作的windows应用程序，分享与大家！

  1 public partial class Form1 : Form
  2     {
  3         public Form1()
  4         {
  5             InitializeComponent();
  6         }
  7 
  8         private void button1_Click(object sender, EventArgs e)
  9         {
 10             var connectionString = this.txtConnectionString.Text;
 11             var fromEdmx = this.txtFrom.Text;
 12             var toEdmx = this.txtTo.Text;
 13             var nameSpace = this.txtNamespace.Text;
 14             if (connectionString == "")
 15             {
 16                 MessageBox.Show("请填写数据库链接字符串！");
 17                 return;
 18             }
 19             if (fromEdmx == "")
 20             {
 21                 MessageBox.Show("请填写源Edmx文件的物理路径！");
 22                 return;
 23             }
 24             if (toEdmx == "")
 25             {
 26                 MessageBox.Show("请填写新生成Edmx文件的物理路径！");
 27                 return;
 28             }
 29             if (nameSpace == "")
 30             {
 31                 MessageBox.Show("请填写Edmx中的xmlns命名空间（每个版本可能不一样）！");
 32                 return;
 33             }
 34             try
 35             {
 36                 var creater = new Creater(connectionString, fromEdmx, toEdmx, nameSpace);
 37                 creater.CreateDocumentation();
 38                 creater.Dispose();
 39                 MessageBox.Show("操作成功了，哥们！如何谢我？");
 40             }
 41             catch (Exception ex)
 42             {
 43                 MessageBox.Show("对不住，兄弟，可能是你的错，也可能是我的错！参考下具体信息：" + ex.Message);
 44                 //throw;
 45             }
 46             
 47         }
 48     }
 49 
 50     public class Creater
 51     {
 52         public String ConnectionString { get; set; }
 53         public String InputFileName { get; set; }
 54         public String OutputFileName { get; set; }
 55         public SqlConnection Connection { get; set; }
 56         public String XmlnsNameSpace { get; set; }
 57 
 58 
 59         public Creater(String connectionString, String inputFileName, String outputFileName, string nameSpace)
 60         {
 61             this.ConnectionString = connectionString;
 62             this.InputFileName = inputFileName;
 63             this.OutputFileName = outputFileName;
 64             this.XmlnsNameSpace = nameSpace;
 65             this.Connection = new SqlConnection(connectionString);
 66             this.Connection.Open();
 67         }
 68         public void Dispose()
 69         {
 70             this.Connection.Dispose();
 71         }
 72         public void CreateDocumentation()
 73         {
 74 
 75             var doc = XDocument.Load(this.InputFileName);
 76             var entityTypeElements = doc.Descendants("{" + XmlnsNameSpace + "}EntityType");
 77 
 78             var i = 0;
 79             foreach (var entityTypeElement in entityTypeElements)
 80             {
 81                 var tableName = entityTypeElement.Attribute("Name").Value;
 82                 var propertyElements = entityTypeElement.Descendants("{" + XmlnsNameSpace + "}Property");
 83 
 84                 this.AddNodeDocumentation(entityTypeElement, GetTableDocumentation(tableName));
 85 
 86                 foreach (var propertyElement in propertyElements)
 87                 {
 88                     var columnName = propertyElement.Attribute("Name").Value;
 89                     this.AddNodeDocumentation(propertyElement, GetColumnDocumentation(tableName, columnName));
 90                 }
 91             }
 92 
 93             if (File.Exists(this.OutputFileName))
 94                 File.Delete(this.OutputFileName);
 95             doc.Save(this.OutputFileName);
 96         }
 97         private void AddNodeDocumentation(XElement element, String documentation)
 98         {
 99             if (String.IsNullOrEmpty(documentation))
100                 return;
101             element.Descendants("{" + XmlnsNameSpace + "}Documentation").Remove();
102 
103             element.AddFirst(new XElement("{" + XmlnsNameSpace + "}Documentation", new XElement("{" + XmlnsNameSpace + "}Summary", documentation)));
104         }
105         private String GetTableDocumentation(String tableName)
106         {
107             using (var command = new SqlCommand(@" SELECT [value] 
108                                                           FROM fn_listextendedproperty (
109                                                                 'MS_Description', 
110                                                                 'schema', 'dbo', 
111                                                                 'table',  @TableName, 
112                                                                 null, null)", this.Connection))
113             {
114 
115                 command.Parameters.AddWithValue("TableName", tableName);
116 
117                 return command.ExecuteScalar() as String;
118             }
119         }
120         private String GetColumnDocumentation(String tableName, String columnName)
121         {
122             using (var command = new SqlCommand(@"SELECT [value] 
123                                                          FROM fn_listextendedproperty (
124                                                                 'MS_Description', 
125                                                                 'schema', 'dbo', 
126                                                                 'table', @TableName, 
127                                                                 'column', @columnName)", this.Connection))
128             {
129 
130                 command.Parameters.AddWithValue("TableName", tableName);
131                 command.Parameters.AddWithValue("ColumnName", columnName);
132 
133                 return command.ExecuteScalar() as String;
134             }
135         }
136     }