vb.net 你如何连接来自两个 TextBox 的字符串？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/22457128/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How do you concatenate strings from two TextBoxes?
提问by user3428637
for example in this code
例如在这段代码中
Public Class Form1
Dim a As Object
Dim b As Object
Dim c As Object
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
a = Val(TextBox1.Text)
b = Val(TextBox2.Text)
c = Val(TextBox3.Text)
TextBox3.Text = a + b
' TextBox4.Text = "a + b = c"
End Sub
End Class
How can i make TextBox4.Text show the numbers, (=) sign, and (+) sign i.e.
我怎样才能让 TextBox4.Text 显示数字、（=）符号和（+）符号，即
TextBox1.Text = "2" and TextBox2.Text = "3" and TextBox3.Text = "5"
TextBox1.Text = "2" and TextBox2.Text = "3" and TextBox3.Text = "5"
How can i make TextBox4.Text = "2 + 3 = 5"
我怎样才能让 TextBox4.Text = "2 + 3 = 5"
(the string not the value)
（字符串不是值）
回答by PugFugly
You can concatenate strings by using either the &or +operator, like this:
您可以使用&or+运算符连接字符串，如下所示：
TextBox4.Text = TextBox1.Text & " + " & TextBox2.Text & " = " & TextBox3.Text
In VB.NET, the &operator is preferred for string concatenations, but, as long as you have Option Strict On, the +operator is just as safe to use:
在 VB.NET 中，&运算符首选用于字符串连接，但是，只要您有Option Strict On，+运算符就可以安全使用：
TextBox4.Text = TextBox1.Text + " + " + TextBox2.Text + " = " + TextBox3.Text
Alternatively, for more complicated concatenations, like this one, you may find it easier to use String.Format, like this:
或者，对于更复杂的串联，比如这个，你可能会发现它更容易使用String.Format，就像这样：
TextBox4.Text = String.Format("{0} + {1} = {2}", TextBox1.Text, TextBox2.Text, TextBox3.Text)
