VB.NET有一个方法,就像java一样,附加到StringBuilder类型的对象 但是我可以在这个对象之前添加(我的意思是在stringbuilder值之前添加一些字符串,而不是之后).这是我的代码:
'Declare an array Dim IntegerList() = {24, 12, 34, 42} Dim ArrayBefore As New StringBuilder() Dim ArrayAfterRedim As New StringBuilder() ArrayBefore.Append("{") For i As Integer = IntegerList.GetLowerBound(0) To IntegerList.GetUpperBound(0) ArrayBefore.Append(IntegerList(i) & ", ") Next ' Close the string ArrayBefore.Append("}") 'Redimension the array (increasing the size by one to five elements) 'ReDim IntegerList(4) 'Redimension the array and preserve its contents ReDim Preserve IntegerList(4) ' print the new redimesioned array ArrayAfterRedim.Append("{") For i As Integer = IntegerList.GetLowerBound(0) To IntegerList.GetUpperBound(0) ArrayAfterRedim.Append(IntegerList(i) & ", ") Next ' Close the string ArrayAfterRedim.Append("}") ' Display the two arrays lstRandomList.Items.Add("The array before: ") lstRandomList.Items.Add(ArrayBefore) lstRandomList.Items.Add("The array after: ") lstRandomList.Items.Add(ArrayAfterRedim)
如果你查看我的代码的最后4行,我想在我的列表框控件中的字符串生成器之前添加文本.所以不是这样的:
lstRandomList.Items.Add("The array before: ") lstRandomList.Items.Add(ArrayBefore)
我想要这样的东西:
lstRandomList.Items.Add("The array before: " & ArrayBefore)
Mark.. 10
您可以使用StringBuilder.Insert
前置到字符串生成器:
Dim sb = New StringBuilder() sb.Append("World") sb.Insert(0, "Hello, ") Console.WriteLine(sb.ToString())
这输出:
Hello, World
编辑
哎呀,注意到@dbasnett在评论中说了同样的话......
您可以使用StringBuilder.Insert
前置到字符串生成器:
Dim sb = New StringBuilder() sb.Append("World") sb.Insert(0, "Hello, ") Console.WriteLine(sb.ToString())
这输出:
Hello, World
编辑
哎呀,注意到@dbasnett在评论中说了同样的话......