C# 参数化存储过程在C语言中的应用#

我试图在我的C#应用程序中调用存储过程，但它并没有真正调用。我尝试了很多次调用它

ExecuteReader

，

NonReader

，

Scalar

等。但它仍然没有被执行。我在下面显示了我的全部代码，包括我曾经使用过的sql命令

请检查我的代码中到底是什么问题

提前谢谢

库存

表格

Create Table Stock
(
--S_ID int Primary Key identity (1,1),
Date_of_Added Datetime Default (getdate()),
EnvType nvarchar(10),
TypeSize nvarchar(10),
Size nvarchar(10),
[Description] sql_variant,
Qty int,
Quality int,
)

Create Table NewProduct
(

MS nvarchar(30),
Date_of_Added Datetime Default (getdate()),
Invoice_No nvarchar(20),
Challan_No nvarchar(20),
EnvType nvarchar(10),
TypeSize nvarchar(10),
Size nvarchar(10),
Description sql_variant,
Qty int,
Quality int,
PayState nvarchar(10),
Balanace_Amount money,
PaymentMode nvarchar(6),
Cheque_No int,
BankDetails nvarchar(30),
P_UnitPrice money,
P_Price money
)

-- Creating trigger of above stored procedure to update or insert the stock as needed
Create Procedure StockProc
(@EnvType nvarchar(50),@TypeSize nvarchar(50),@Size nvarchar(50),@Desc Sql_variant,@Qty    int,@Quality int)
As Begin

if exists (select S.EnvType, S.TypeSize, S.Size, S.[Description], S.Qty, S.Quality
from NewProduct NP Full Join Stock S
on(NP.Size=NP.Size)
where NP.Size=@Size and NP.TypeSize=@TypeSize and NP.EnvType=@EnvType and  NP.Quality=@Quality)
    --Print 'Record Found';
--If Record will found then ut will update the quantity
Begin
    update Stock
    set Qty=NP.Qty+S.Qty
    from NewProduct NP, Stock S
    --have not used IN Operator here as IN works as OR Clause
    where S.EnvType=NP.EnvType and S.TypeSize=NP.TypeSize and S.Size=NP.Size
End
Else
--If no record will match with the enterd data, New Record will be added on Stock Table
Begin
    --Print 'No Record Found'
    insert into Stock (EnvType, TypeSize, Size, [Description], Qty, Quality)
                 values(@EnvType,@TypeSize,@Size,@Desc,@Qty,@Quality)
    --Below Lines will slow down the performance so we are using the above  query
    --Truncate Table Stock
    --insert into Stock (Date_of_Added, EnvType, TypeSize, Size, [Description], Qty, Quality)
    --select Date_of_Added, EnvType, TypeSize, Size, [Description], Qty, Quality from NewProduct
End
End

新产品

表格

Create Table Stock
(
--S_ID int Primary Key identity (1,1),
Date_of_Added Datetime Default (getdate()),
EnvType nvarchar(10),
TypeSize nvarchar(10),
Size nvarchar(10),
[Description] sql_variant,
Qty int,
Quality int,
)

Create Table NewProduct
(

MS nvarchar(30),
Date_of_Added Datetime Default (getdate()),
Invoice_No nvarchar(20),
Challan_No nvarchar(20),
EnvType nvarchar(10),
TypeSize nvarchar(10),
Size nvarchar(10),
Description sql_variant,
Qty int,
Quality int,
PayState nvarchar(10),
Balanace_Amount money,
PaymentMode nvarchar(6),
Cheque_No int,
BankDetails nvarchar(30),
P_UnitPrice money,
P_Price money
)

-- Creating trigger of above stored procedure to update or insert the stock as needed
Create Procedure StockProc
(@EnvType nvarchar(50),@TypeSize nvarchar(50),@Size nvarchar(50),@Desc Sql_variant,@Qty    int,@Quality int)
As Begin

if exists (select S.EnvType, S.TypeSize, S.Size, S.[Description], S.Qty, S.Quality
from NewProduct NP Full Join Stock S
on(NP.Size=NP.Size)
where NP.Size=@Size and NP.TypeSize=@TypeSize and NP.EnvType=@EnvType and  NP.Quality=@Quality)
    --Print 'Record Found';
--If Record will found then ut will update the quantity
Begin
    update Stock
    set Qty=NP.Qty+S.Qty
    from NewProduct NP, Stock S
    --have not used IN Operator here as IN works as OR Clause
    where S.EnvType=NP.EnvType and S.TypeSize=NP.TypeSize and S.Size=NP.Size
End
Else
--If no record will match with the enterd data, New Record will be added on Stock Table
Begin
    --Print 'No Record Found'
    insert into Stock (EnvType, TypeSize, Size, [Description], Qty, Quality)
                 values(@EnvType,@TypeSize,@Size,@Desc,@Qty,@Quality)
    --Below Lines will slow down the performance so we are using the above  query
    --Truncate Table Stock
    --insert into Stock (Date_of_Added, EnvType, TypeSize, Size, [Description], Qty, Quality)
    --select Date_of_Added, EnvType, TypeSize, Size, [Description], Qty, Quality from NewProduct
End
End

--在sql中进行测试时，它工作正常，您可以通过下面的exec代码进行测试

exec StockProc 'fdfdf','sdf','dsfs','sdf',4,5

C#代码：

请帮忙

或者你认为我应该在c#Code中使用UDF而不是存储过程，检查“String query”，它在值之后被错误地写入

---

e、 g.在使用cmd参数时，使用@ms而不是控件名。

首先，我相信错误在您的存储过程中，

StockProc

。使用此更改（我在这里占卜意图，所以您可能需要调整它）：

现在，来看看你的C代码。根据我的意见，遵循a.s.a.p.处理连接的最佳实践：

    private void cmdSave_Click(object sender, EventArgs e)
    {
        try
        {
            using (var con = new SqlConnection(ObjCon.con.ConnectionString))
            {
                // I assume this was just for testing to show a direct INSERT works when the sproc didn't.
                // Otherwise, I'd be using replaceable parameters rather than straight text values as that
                // makes it quite vulnerable to SQL injection attacks. Better yet, make this a sproc as well
                // and use it rather than client-side SQL.
                var query =
                    "INSERT INTO NewProduct ([MS], [Date_of_Added], [Invoice_No], [Challan_No], [EnvType], [TypeSize], [Size],[Description], [Qty], [Quality], [PayState], [Balanace_Amount], [PaymentMode], [Cheque_No], [BankDetails], [P_UnitPrice], [P_Price])  VALUES ('"
                    + txtMs.Text + "','" + dtpNewProduct.Value + "','" + txtInvoiceNo.Text + "','"
                    + txtChallanNo.Text + "','" + cboType.Text + "','" + txtTypeSize1.Text + "X" + txtTypeSize2.Text
                    + "','" + txtSize1.Text + "X" + txtSize2.Text + "','" + txtDesc.Text + "','" + nudQty.Value
                    + "','" + nudQuality.Value + "','" + cboPayState.Text + "','" + txtBalAmt.Text + "','"
                    + cboPayMode.Text + "','" + txtChequeNo.Text + "','" + txtBankNameBranch.Text + "','"
                    + txtPUPrice.Text + "','" + txtPPrice.Text + "')";

                using (var cmd = new SqlCommand(query, con))
                {
                    con.Open();
                    cmd.ExecuteNonQuery();
                }
            }

            using (var con = new SqlConnection(ObjCon.con.ConnectionString))
            using (var cmd2 = new SqlCommand("StockProc", con))
            {
                cmd2.CommandType = CommandType.StoredProcedure;
                //cmd2.Parameters.Add(new SqlParameter("@Date_of_Added", dtpNewProduct.Value));
                cmd2.Parameters.Add(new SqlParameter("@EnvType", cboType.Text));
                cmd2.Parameters.Add(new SqlParameter("@TypeSize", txtTypeSize1.Text + "X" + txtTypeSize2.Text));
                cmd2.Parameters.Add(new SqlParameter("@Size", txtSize1.Text + "X" + txtSize2.Text));
                cmd2.Parameters.Add(new SqlParameter("@Desc", txtDesc.Text));
                cmd2.Parameters.Add(new SqlParameter("@Qty", nudQty.Value));
                cmd2.Parameters.Add(new SqlParameter("@Quality", nudQuality.Value));

                //http://www.java2s.com/Tutorial/CSharp/0560__ADO.Net/Callstoredprocedureandpassintheparameter.htm
                //cmd2.Parameters.Add(new SqlParameter("@EnvType", SqlDbType.NVarChar)).Value = cboType.Text;
                //cmd2.Parameters.Add(new SqlParameter("@TypeSize", SqlDbType.NVarChar)).Value = txtTypeSize1.Text + "X" + txtTypeSize2.Text;
                //cmd2.Parameters.Add(new SqlParameter("@Size", SqlDbType.NVarChar )).Value=txtSize1.Text + "X" + txtSize2.Text;
                //cmd2.Parameters.Add(new SqlParameter("@Desc", SqlDbType.Variant)).Value=txtDesc.Text;
                //cmd2.Parameters.Add(new SqlParameter("@Qty",SqlDbType.Int)).Value= nudQty.Value;
                //cmd2.Parameters.Add(new SqlParameter("@Quality", SqlDbType.Int)).Value = nudQuality.Value;

                con.Open();
                cmd2.ExecuteNonQuery();
            }

            MessageBox.Show("Your Details has been Saved\rThank You", "Save", MessageBoxButtons.OK, MessageBoxIcon.Information);
            this.Close();
        }
        catch (Exception ex)
        {
            MessageBox.Show("The Following Error Occurred" + ex, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            this.Close();
        }
    }

---

“它不是真正的调用”并不是对正在发生的事情的一个很好的描述。你有例外吗？如果是这样，那又怎样？目前，您提供的代码没有试图调用它。您添加了一组参数，仅此而已。您已经注释掉了

ExecuteNonQuery

etc调用。如果使用

ExecuteNonQuery

，会发生什么情况？什么都没有，只执行第一个查询，存储过程没有响应，但是如果删除任何参数，我会直接得到一个异常，即缺少“指定的参数名”…首先，没有人调用Jon Skeet“dude”。其次为什么不编辑您提供的代码示例以反映您实际尝试过的内容，而不是提供注释过的代码，然后努力传达您实际尝试过的内容呢？我也有点担心

ObjCon.con

-它看起来像一个连接对象，其生存期未知，并且在任何给定时间都不会假定其状态。最佳做法是在需要时创建连接对象（例如，就在创建和调用命令对象之前），并在完成后立即将其处置。如果连接字符串没有更改（不太可能！），则连接本身将由运行时池化，并且不会招致任何惩罚。这很好，即使hat查询也可以正常工作。我在存储过程中收到一个错误。您忘记在服务器cmd2上执行。ExecuteOnQuery（）；您可以看到cmd2.ExecuteNonQuery（）；我的意思是说我也尝试过……尝试这种方法（不带“@”）：cmd2.Parameters.Add（new-SqlParameter（“EnvType”，cboType.Text））；你可以看到注释重要代码引起的混乱，我想是吧？也许不是，因为它被指出了，而你没有纠正它。你为什么不现在就停止，确切地说明什么是不能正常工作的？