EF6 根据数据库字段说明，生成字段注释

Posted 2020-10-11 小小程序员

EF6 根据数据库字段说明，生成字段注释

第一步: 在Model.tt文件添加一个方法读取数据库中的字段说明

　　找到public string Property(EdmProperty edmProperty)这个方法，添加到这个方法下面

public string GetRemark(EdmProperty edmProperty){  
        //System.Diagnostics.Debugger.Launch();  
        var tableName = edmProperty.DeclaringType.Name;  
        var colName=_code.Escape(edmProperty);  
        //System.Diagnostics.Debugger.Break();  
        string sql = string.Format(@"SELECT  字段说明=isnull(props.[value],\'\')  FROM syscolumns cols  inner join sysobjects objs on cols.id= objs.id and  objs.xtype=\'U\' and  objs.name<>\'dtproperties\'  left join sys.extended_properties props on cols.id=props.major_id and cols.colid=props.minor_id  where  objs.name=\'{0}\' and cols.name=\'{1}\'",tableName,colName);  
        string sqlcon = "Data Source=191.108.12.130;User ID=sa;Password=123456;Initial Catalog=TTTT";  
        object remark=new object();  
        using(System.Data.SqlClient.SqlConnection conn = new System.Data.SqlClient.SqlConnection(sqlcon)){  
            conn.Open();  
            System.Data.SqlClient.SqlCommand cmd = new System.Data.SqlClient.SqlCommand(sql, conn);  
            remark =cmd.ExecuteScalar();      
        }        

 

 第二步:找到var simpleProperties = typeMapper.GetSimpleProperties(entity);修改如下：

var simpleProperties = typeMapper.GetSimpleProperties(entity);
    if (simpleProperties.Any())
    {
        foreach (var edmProperty in simpleProperties)
        {
        #>  
    /// <summary>  
    /// <#=codeStringGenerator.GetRemark(edmProperty)#>  
    /// </summary>  
    <#=codeStringGenerator.Property(edmProperty)#>  
<# 
        }
    }

第三步：保存模板，就可以看到实体字段注释