区域“菜单功能和子”

Question

如何将以下产品价格显示为7.99美元等？我已经尝试了所有可以找到的东西。这是db表中的小钱。谢谢。

受保护的子printMenuBlock（ByVal productName As String） '设置存储产品的变量并从数据库中拉出 Dim product = ReadProduct（productName）

    'Add necessary markup to str variable, with products information within

    For i As Integer = 0 To product.Count - 1

        str += "<div class='menuItem'>"
        'str += "    <img alt='Item Picture' class='itemPicture' src='" + product(i).ImagePath.Substring(3).Replace("\", "/") + "' />"
        str += "    <div class='itemInfo'>"
        str += "        <h1 class='itemName'>"
        str += "            " + product(i).Item("ProductName") + "</h1>"
        'str += "        <h3 class='itemDescription'>"
        str += "            " + product(i).Item("ProductDescription")
        str += "        <h1 class ='itemPrice'>"
        str += "            " + String.Format("{0:C}", product(i).Item("ProductPrice")) + "</h1>"
        str += "        "
        str += "        </div>"

        str += "    </div>"

    Next

这是来自互动课程的代码：

公共班级互动 'Sql命令对象的新实例私有cmdSelect为新的SqlCommand 'Connection类的实例私人conIn为新连接

区域“菜单功能和子”

' Set up the SQL statement for finding a Product by ProductCat
Private Sub GetProduct(ByVal CatIn As String)
    ' SQL String

    Dim strSelect As String
    strSelect = "SELECT *  "
    strSelect &= " FROM Menu "
    'strSelect &= " WHERE ProductCat = @CatIn"
    strSelect &= "ORDER BY 'ProductCat'"
    ' Set up the connection to the datebase
    cmdSelect.Connection = conIn.Connect
    ' Add the SQL string to the connection
    cmdSelect.CommandText = strSelect
    ' Add the parameters to the connection
    cmdSelect.Parameters.Add("@CatIn", SqlDbType.NVarChar).Value = CatIn
End Sub



'Function to create list of rows and columns
Public Function ReadProduct(ByVal CatIn As String) As List(Of Dictionary(Of String, Object))
    'Declare variable to hold list
    Dim ReturnProducts As New List(Of Dictionary(Of String, Object))
    Try
        Call GetProduct(CatIn)
        Dim dbr As SqlDataReader
        ' Execute the created SQL command from GetProduct and set to the SqlDataReader object
        dbr = cmdSelect.ExecuteReader
        'Get number of columns in current row
        Dim FieldCount = dbr.FieldCount()
        Dim ColumnList As New List(Of String)
        'Loop through all columns and add to list
        For i As Integer = 0 To FieldCount - 1
            ColumnList.Add(dbr.GetName(i))
        Next
        While dbr.Read()
            'Declare variable to hold list
            Dim ReturnProduct As New Dictionary(Of String, Object)
            'Loop through all rows and add to list
            For i As Integer = 0 To FieldCount - 1
                ReturnProduct.Add(ColumnList(i), dbr.GetValue(i).ToString())
            Next
            'Add to final list
            ReturnProducts.Add(ReturnProduct)
        End While
        cmdSelect.Parameters.Clear()
        'Close connection
        dbr.Close()
    Catch ex As SqlException
        Dim strOut As String
        strOut = ex.Message
        Console.WriteLine(strOut)
    End Try
    ' Return the Product object
    Return ReturnProducts
End Function

Answer 1

尝试使用

+ String.Format("{0:C}", product(i).Item("ProductPrice")) +

P.S。您可能希望将StringBuilder用于这些类型的构造。

需要将str从sql查询更改为货币

区域“菜单功能和子”

1 个答案: