檢測表的主鍵

Question

我正在嘗試生成一些自定義實體和自定義方法以從數據庫中獲取數據。

ListByPrimaryKey - 列名，有時是 「ID」， 「PID」， 「ID」 等

你怎麼能檢測到一列是使用C＃，使用T4模板的主鍵？

protected void GenerateListByMethods(Table table) 
{ 
    WriteLine("#region ListBy\n"); 

    WriteLine("\n\tpublic List<"+Prefix+table.Name+"> ListAll()\n\t{\n\t " + 
     this.RepositoryNotification + 
     "\n\t\t\t return Ctx.GetAll().ToList().ToCustomList<"+table.Name+","+Prefix+table.Name+">();\n\t}\n"); 
    foreach (Column column in table.Columns) 
    { 
     switch(column.DataType.Name) 
     { // do something 

如何編寫column.DataType.IsPrimaryKey的擴展方法？

Answer 1

如果您正在使用SQL Server嘗試運行要麼querys

SELECT i.name AS IndexName, 
     OBJECT_NAME(ic.OBJECT_ID) AS TableName, 
     COL_NAME(ic.OBJECT_ID,ic.column_id) AS ColumnName 
FROM sys.indexes AS i INNER JOIN 
     sys.index_columns AS ic ON i.OBJECT_ID = ic.OBJECT_ID 
           AND i.index_id = ic.index_id 
WHERE i.is_primary_key = 1 

或

select * 
from sysobjects 
where xtype='pk' and 
    parent_obj in (select id from sysobjects where name='tablename')