似乎你想要这样的东西，它会把你的字符串放在一个固定长度的字符串中的一个固定点上:

Dim totallength As Integer = 100
Dim leftbuffer as Integer = 5
Dim mystring As String = "string goes here"
Dim Formatted_String as String = mystring.PadLeft(leftbuffer + mystring.Length, "-") + String.Empty.PadRight(totallength - (mystring.Length + leftbuffer), "-")

注意，如果mystring。Length + leftbuffer超过totallength

至少，第一个和最后一个可以使用以下语法:

String.Format("{0,20}", "String goes here");
String.Format("{0,-20}", "String goes here");

试试这个:

"String goes here".PadLeft(20,' ');
"String goes here".PadRight(20,' ');

对于中心，获取字符串的长度，并使用必要的字符进行左padleft和右padright操作

int len = "String goes here".Length;
int whites = len /2;
"String goes here".PadRight(len + whites,' ').PadLeft(len + whites,' ');

这是VB。我创建的NET版本，受到Joel Coehoorn的回答、Oliver的编辑和shaunmartin的评论的启发:

    <Extension()>
Public Function PadCenter(ByVal [string] As String, ByVal width As Integer, ByVal c As Char) As String

    If [string] Is Nothing Then [string] = String.Empty
    If (width <= [string].Length) Then Return [string]

    Dim padding = width - [string].Length
    Return [string].PadLeft([string].Length + (padding \ 2), c).PadRight(width, c)

End Function

<Extension()>
Public Function PadCenter(ByVal [string] As String, ByVal width As Integer) As String

    If [string] Is Nothing Then [string] = String.Empty
    If (width <= [string].Length) Then Return [string]

    Dim padding = width - [string].Length
    Return [string].PadLeft([string].Length + (padding \ 2)).PadRight(width)

End Function

This is set up as a string extension, inside a Public Module (the way you do Extensions in VB.NET, a bit different than C#). My slight change is that it treats a null string as an empty string, and it pads an empty string with the width value (meets my particular needs). Hopefully this will convert easily to C# for anyone who needs it. If there's a better way to reference the answers, edits, and comments I mentioned above, which inspired my post, please let me know and I'll do it - I'm relatively new to posting, and I couldn't figure out to leave a comment (might not have enough rep yet).

我发布了一篇CodeProject文章，可能就是你想要的。

参见:间接宽度和样式格式化的c#方法。

基本上它是一个方法，FormatEx，它的作用类似于String。格式，除了它允许居中对齐修饰符。

FormatEx("{0,c10}", value);

意味着将varArgs[0]的值置于10个字符宽字段的中心，如果需要额外的填充空间，则向右倾斜。

FormatEx("{0,c-10}", value);

意味着将varArgs[0]的值置于10个字符宽字段的中心，如果需要额外的填充空间，则向左倾斜。

编辑:在内部，它是Joel的PadCenter与一些解析的组合，以重新构造格式和varArgs调用String。格式，做你想要的。

杰西

从Visual Studio 2015开始，你也可以使用Interpolated Strings(这是一个编译器的技巧，所以你的目标是哪个版本的。net框架并不重要)。

string value = "String goes here";
string txt1 = $"{value,20}";
string txt2 = $"{value,-20}";