vb.net 百分比函数
时间: 2023-06-03 18:05:20 浏览: 112
VB.Net 中计算百分比的函数为“Percent”或“Percentile”。可以使用以下代码实现:
Dim percentage As Double
Dim numerator As Double = 20
Dim denominator As Double = 50
percentage = Microsoft.VisualBasic.Financial.Percent(numerator / denominator)
其中,numerator表示分子,denominator表示分母,percentage即为所求的百分比。
相关问题
vb.net gettouchinputinfo函数怎么用
可以通过以下方式来使用 vb.net gettouchinputinfo 函数:
1.首先,需要导入 System.Runtime.InteropServices 命名空间。
2.然后,可以定义以下结构体:
<StructLayout(LayoutKind.Sequential)>
Structure TOUCHINPUT
Public x As Integer
Public y As Integer
Public hSource As IntPtr
Public dwID As Integer
Public dwFlags As Integer
Public dwMask As Integer
Public dwTime As Integer
Public dwExtraInfo As IntPtr
Public cxContact As Integer
Public cyContact As Integer
End Structure
3.接下来,可以定义以下函数:
Declare Function GetTouchInputInfo Lib "user32.dll" (ByVal hTouchInput As IntPtr, ByVal cInputs As Integer, ByVal pInputs As TOUCHINPUT(), ByVal cbSize As Integer) As Boolean
4.最后,可以使用以下代码调用 GetTouchInputInfo 函数:
Dim touchInputs(10) As TOUCHINPUT
Dim touchInputSize As Integer = Marshal.SizeOf(GetType(TOUCHINPUT))
Dim inputCount As Integer = GetTouchInputInfo(hTouchInput, touchInputs.Length, touchInputs, touchInputSize)
注意:以上代码的 hTouchInput 参数需要根据具体情况进行设置。
VB.NET Split函数的应用
VB.NET中的Split函数可以将一个字符串按照指定的分隔符分割成一个字符串数组。其语法如下:
```
Split(expression[, delimiter[, count[, compare]]])
```
其中,参数说明如下:
- expression:要分割的字符串。
- delimiter:分隔符,可以是单个字符或多个字符组成的字符串。
- count:可选参数,指定返回的数组元素的最大个数。默认值为-1,表示返回所有元素。
- compare:可选参数,指定比较字符串时使用的比较方法。默认值为vbBinaryCompare,表示二进制比较。
例如,我们可以使用Split函数将一个句子按照空格分割成单词,代码如下:
```
Dim sentence As String = "This is a test sentence."
Dim words As String() = sentence.Split(" ")
For Each word As String In words
Console.WriteLine(word)
Next
```
输出结果如下:
```
This
is
a
test
sentence.
```
另外,我们还可以使用Split函数分割CSV格式的数据,例如:
```
Dim csvData As String = "name,age,gender" & vbCrLf & "Tom,20,Male" & vbCrLf & "Lucy,25,Female"
Dim rows As String() = csvData.Split({vbCrLf}, StringSplitOptions.RemoveEmptyEntries)
For i As Integer = 0 To rows.Length - 1
Dim cols As String() = rows(i).Split(",")
For j As Integer = 0 To cols.Length - 1
Console.Write(cols(j) & vbTab)
Next
Console.WriteLine()
Next
```
输出结果如下:
```
name age gender
Tom 20 Male
Lucy 25 Female
```
以上就是VB.NET中Split函数的应用。