如何製作C＃DataTable過濾器

Question

my datatable;

dtData 

    ID | ID2 
    -------- 
    1 | 2 
    1 | 3 


dtData.Select("ID = 1"); one more rows; 

我想要「ID = 1和ID2 = 3」的行如何製作？

Answer 1

你的意思是這樣？：

dtData.Select("ID=1 AND ID2=3"); 

Answer 2

好了，這是我做這樣的事情......在我的選擇（）

GridFieldDAO dao = new GridFieldDAO(); 
    //Load My DataTable 
    DataTable dt = dao.getDT(); 
    //Get My rows based off selection criteria 
    DataRow[] drs = dt.Select("(detailID = 1) AND (detailTypeID = 2)"); 
    //make a new "results" datatable via clone to keep structure 
    DataTable dt2 = dt.Clone(); 
    //Import the Rows 
    foreach (DataRow d in drs) 
    { 
     dt2.ImportRow(d); 
    } 
    //Bind to my new DataTable and it will only show rows based off selection 
    //criteria 
    myGrid.DataSource = dt2; 
    myGrid.DataBind(); 

通知我把準則的括號之間AND and 或

希望這會有所幫助！ 邁克V

Answer 3

更好地利用這一點：

GridFieldDAO dao = new GridFieldDAO(); 
//Load My DataTable 
DataTable dt = dao.getDT(); 
//Get My rows based off selection criteria and copy them directly to datatable 
DataTable dt2 = dt.Select("(detailID = 1) AND (detailTypeID = 2)").CopyToDataTable(); 

Answer 4

很好的例子和非常有益的。想補充說明一兩件事 - 如果你需要一個字符串使用類似選擇：

DataTable dt2 = dt.Select("state = 'FL' "); 

Answer 5

DataTable dt2 = dt.Select("ID = 1").CopyToDataTable; 

確保DT中有

Answer 6

DataTable dt2 = dt.Select("state = 'FL' ").CopyToDataTable;