如何在運行時使用C＃在MS Access中創建存儲查詢

Question

我正在使用Windows應用程序。在這裏，我需要在運行時在MS Access 2007中創建存儲的查詢（即在按鈕單擊時）選擇，插入，更新，刪除，如何根據參數調用表單中的查詢？

cmmd.CommandText = "CREATE TABLE tblCustomers ([CustomerID] AUTOINCREMENT PRIMARY KEY, CustomerName Text(50), [CategoryID] Long REFERENCES tblCategories (CategoryID), [IsActive] YesNo, [ModifiedBy] Long REFERENCES tblUsers (UserID), [ModifiedDate] Date)"; 
cmmd.ExecuteNonQuery(); 

//Above Create table tblCustomers executed successfully, 

cmmd.CommandText = @"CREATE PROCEDURE prAddCustmer (CustName Text(50), CatID Long, Inact No, ModBY Long, ModDate date) AS INSERT INTO tblCustomers (CustomerName , CategoryID, Inactive, ModifiedBy, ModifiedDate) VALUES(CustName, [CatID], [Inac], [ModBy], [ModDate]);"; 
cmmd.ExecuteNonQuery(); 
//But got error in Create Procedure prAddCustomers, Please find error in the Stored query and suggest the correct answer 
//Syntax error in PARAMETER clause. 

Answer 1

如果你想在你的Access數據庫中創建一個新的存儲查詢，您應該簡單地準備命令並執行它。

例如，假設您有客戶表，並且您想要使用查詢檢索單個客戶的記錄。

要創建查詢

string cmdText = @"CREATE PROCEDURE Customer_SelectOne (custID Long) as 
    SELECT * FROM Customers WHERE IDCustomer = [custID]"; 
OleDbCommand cmd = new OleDbCommand(cmdText, connection); 
cmd.ExecuteNonQuery(); 

要調用查詢，它再是一個簡單的命令標記爲CommandType = CommandType.StoredProcedure

string cmdText = "Customer_SelectOne"; 
OleDbCommand cmd = new OleDbCommand(cmdText, connection); 
cmd.CommandType = CommandType.StoredProcedure; 
cmd.Parameters.AddWithValue("custID", customerID); 
OleDbDataReader reader = cmd.ExecuteReader(); 

上面的例子是非常簡單的。對於更復雜的情況，您需要查看MS-Access Data Definition Language區域中的參考。

編輯

語法：

CREATE PROCEDURE ProcName 
       (optional list of parameters with type and size for Text) 
        AS 
       (Valid SQL Statement using the optional parameters list) 

所以這應該是你的 'prAddCustomers'

cmmd.CommandText = @"CREATE PROCEDURE prAddCustomers 
        (CustName Text(50), 
         CatID Long, 
         IsActive BIT, 
         ModBY Long, 
         ModDate DATETIME) 
        as 
        INSERT INTO tblCustomers 
         (CustomerName, CategoryID, IsActive, ModifiedBy, ModifiedDate) 
        VALUES([CustName], [CatID], [IsActive], [ModID],[ModDate])";