Question

我正在使用我的.NET应用程序中名为“Aeonhack”的用户创建的Graph Control。添加时，比方说，一个大小为9的点，它必须是像9.0F一样的单身。

所以我想要一个将9之类的整数转换为像9.0F这样的整数的函数。

普通CType无效，我也尝试过：

Private Function IntToSingle(ByVal Number As Integer) As Single
    Return CType(Number & ".0F", Single)
End Function

Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
    GraphConnections.AddValue(IntToSingle(7))
End Sub

这给了我这个错误：

从字符串“7.0F”到“单一”类型的转换无效。

我该如何解决这个问题？

Answer 1

使用Convert.ToSingle：

Convert.ToSingle(Number)

或只是CType，没有奇怪的字符串连接：

CType(Number, Single)

Answer 2

您可以使用它转换为单个：CSng(9)，但我认为这仅适用于VB.NET。

Answer 3

I think the confusion is with 7.0F. That is not the same thing as the string "7.0F".

Per Microsoft

Appending the literal type character F to a literal forces it to the single data type.

You could simply use the F to force a double literal to be a single data type.

GraphConnections.AddValue(7.0F)

If, however, you receive an integer variable, then you would need to convert or cast it to a single as suggested by @MarcinJuraszek.

dim point As Integer = 7

GraphConnections.AddValue(Convert.ToSingle(point))

将整数转换为单个

3 个答案: