Question

我在更新客户表时遇到此错误：

过程或函数'Update_Customer'需要参数'@CustomerPhoto'，但未提供。

存储过程代码：

ALTER procedure [dbo].[Update_Customer]
    @CustomerID int output,
    @CustomerName nvarchar (50),
    @CustomerPhoto image,
    @CustomerEmail nvarchar(Max),
    @CustomerPhone1 nvarchar(12),
    @CustomerPhone2 nvarchar(12),
    @CustomerAddress nvarchar(Max),
    @CustomerFax nvarchar(12),
    @CustomerStatus bit,
    @CountryID int,
    @CityID int,
    @Notes nvarchar (Max),
    @ModifiedBy nvarchar (30)
AS
BEGIN
    UPDATE CustomersTbl 
    SET CustomerID = @CustomerID,
        CustomerName = @CustomerName,
        CustomerPhoto = @CustomerPhoto,
        CustomerEmail = @CustomerEmail,
        CustomerPhone1 = @CustomerPhone1,
        CustomerPhone2 = @CustomerPhone2,
        CustomerAddress = @CustomerAddress,
        CustomerFax = @CustomerFax,
        CustomerStatus = @CustomerStatus,
        CountryID = @CountryID,
        CityID = @CityID,
        Notes = @Notes,
        ModifiedDate = GETDATE(),
        ModifiedBy = @ModifiedBy
    WHERE
        CustomerID = @CustomerID
END

数据层类代码：

Friend Function Update_Customer(ByVal CustomerID As String, ByVal CustomerName As String, ByVal CustomerEmail As String, ByVal CustomerPhone1 As String, ByVal CustomerPhone2 As String, ByVal CustomerAddress As String, ByVal CustomerFax As String, ByVal CustomerStatus As Boolean, ByVal CountryID As Integer, ByVal CityID As Integer, ByVal Notes As String, ByVal ModifiedBy As String) As String
    Dim retval As String

    Dim cmd As New SqlCommand("Update_Customer")

    cmd.Parameters.AddWithValue("@CustomerID", CustomerID)
    cmd.Parameters.AddWithValue("@CustomerName", CustomerName)
    cmd.Parameters.AddWithValue("@CustomerPhoto", SqlDbType.Image).Value = photo
    cmd.Parameters.AddWithValue("@CustomerEmail", CustomerEmail)
    cmd.Parameters.AddWithValue("@CustomerPhone1", CustomerPhone1)
    cmd.Parameters.AddWithValue("@CustomerPhone2", CustomerPhone2)
    cmd.Parameters.AddWithValue("@CustomerAddress", CustomerAddress)
    cmd.Parameters.AddWithValue("@CustomerFax", CustomerFax)
    cmd.Parameters.AddWithValue("@CustomerStatus", CustomerStatus)
    cmd.Parameters.AddWithValue("@CountryID", CountryID)
    cmd.Parameters.AddWithValue("@CityID", CityID)
    cmd.Parameters.AddWithValue("@Notes", Notes)
    cmd.Parameters.AddWithValue("@ModifiedBy", ModifiedBy)

    retval = dm.executeNonQuery(cmd)

    Return retval
End Function

业务层类代码：

Public Function Update_Customer_WithOutPic(ByVal CustomerID As String, ByVal CustomerName As String, ByVal CustomerEmail As String, ByVal CustomerPhone1 As String, ByVal CustomerPhone2 As String, ByVal CustomerAddress As String, ByVal CustomerFax As String, ByVal CustomerStatus As Boolean, ByVal CountryID As Integer, ByVal CityID As Integer, ByVal Notes As String, ByVal ModifiedBy As String) As String
    Dim retval As String
    retval = p.Update_Customer_WithOutPic(CustomerID, CustomerName, CustomerEmail, CustomerPhone1, CustomerPhone2, CustomerAddress, CustomerFax, CustomerStatus, CountryID, CityID, Notes, ModifiedBy)
    Return retval
End Function

更新按钮代码：

Dim retval As String = p.Update_Customer(txtCustomerCode.Text, txtCustomerName.Text, txtCustomerEmail.Text, txtCustomerPhone1.Text, txtCustomerPhone2.Text, txtCustomerAddress.Text, txtCustomerFax.Text, CheckBox2.Checked, ComboCustomerCountry.SelectedValue, ComboCustomerCity.SelectedValue, txtCustomernote.Text, FrmMain.LblUserID.Text)

错误：

过程或函数'Update_Customer'需要参数'@CustomerPhoto'，但未提供。

Answer 1

在Update_Customer()函数中，您需要为photo数组提供Byte()的值。

以下是MSDN documentation：

中的一个释义示例

Class Test
  Sub Save(connectionString As String, photoFilePath As String)
    Dim photo As Byte() = GetPhoto(photoFilePath)

    Using connection As SqlConnection = New SqlConnection(connectionString)
      Using command As New SqlCommand(
        "INSERT INTO Employees (Photo) Values (@Photo)", connection)

        command.Parameters.Add("@Photo", SqlDbType.Image, photo.Length).Value = photo
        connection.Open()
        command.ExecuteNonQuery()
      End Using
    End Using
  End Sub



  Public Shared Function GetPhoto(filePath As String) As Byte()
    Dim photo As Byte()

    Using stream As New FileStream(filePath, FileMode.Open, FileAccess.Read)
      Using reader As New BinaryReader(stream)
        photo = reader.ReadBytes(stream.Length)
      End Using
    End Using

    Return photo
  End Function
End Class

预计参数'@CustomerPhoto'，未提供

1 个答案: