C＃SQL更新查詢

Question

我需要用它來update的note column in sql table

using (SqlConnection conn = new SqlConnection()) 
{ 
    SqlConnection connorder = new SqlConnection("Data Source=P4\\WORK;Initial Catalog=Agenda_X1;Persist Security Info=True;User ID=sa;Password=xxx"); 
    connorder.Open(); 

    string ordernrsql = lbOrderNr.Text; 
    string newstate = lbNewState.Text; 

    SqlCommand commandorder = new SqlCommand("UPDATE [Agenda_X1].[dbo].[Order] SET Note = @lbNewState WHERE OrderNr= @ordernumber", connorder); 
    commandorder.Parameters.Add("@ordernumber", SqlDbType.NVarChar).Value = ordernrsql; 
    commandorder.Parameters.Add("@lbNewState", SqlDbType.NVarChar).Value = newstate; 
    connorder.Close(); 
} 

在VS FR - SQL Commnad展臺看起來像這樣

`DECLARE @ordernumber NVarChar; 
SET @ordernumber = 'OPT1710420'; 
DECLARE @lbNewState NVarChar; 
SET @lbNewState = 'Order changed 2017.06.02'; 

UPDATE [SAgenda_X1].[dbo].[Objednavky_ObjednavkaPrijata] SET Note= @lbNewState WHERE OrderNr = @ordernumber 

但是在SQL這didn`t工作，並應是這樣的：

`DECLARE @ordernumber NVarChar (max); 
    SET @ordernumber = 'OPT1710420'; 
    DECLARE @lbNewState NVarChar (max); 
    SET @lbNewState = 'Order changed 2017.06.02'; 

    UPDATE [SAgenda_X1].[dbo].[Objednavky_ObjednavkaPrijata] SET Note= @lbNewState WHERE OrderNr = @ordernumber 

也想問你我該怎麼做最後的sql查詢無線將已經與NVarChar (max) ??

我已經嘗試

commandorder.Parameters.Add("@ordernumber", SqlDbType.NVarChar, -1).Value = ordernrsql; 
commandorder.Parameters.Add("@lbNewState", SqlDbType.NVarChar, -1).Value = newstate; 

但還是SQL，並且不需要改變。

Answer 1

在一個查詢只是執行命令狀commandorder.ExecuteNonQuery();

using (SqlConnection conn = new SqlConnection()) 
{ 
    SqlConnection connorder = new SqlConnection("Data Source=P4\\WORK;Initial Catalog=Agenda_X1;Persist Security Info=True;User ID=sa;Password=xxx"); 
    connorder.Open(); 

    string ordernrsql = lbOrderNr.Text; 
    string newstate = lbNewState.Text; 

    SqlCommand commandorder = new SqlCommand("UPDATE [Agenda_X1].[dbo].[Order] SET Note = @lbNewState WHERE OrderNr= @ordernumber", connorder); 
    commandorder.Parameters.Add("@ordernumber", SqlDbType.NVarChar).Value = ordernrsql; 
    commandorder.Parameters.Add("@lbNewState", SqlDbType.NVarChar).Value = newstate; 

    commandorder.ExecuteNonQuery(); 

    connorder.Close(); 
}