Stringbuilder 从多个数组追加表单

Question

我有一个 StringBuilder，我正在尝试从多个列表中附加参数，如下所示：

var sb = new StringBuilder();
var list1 = new List<string>() { "a", "b", "c" }
var list2 = new List<string>() { "d", "e" }
sb.AppendFormat(" {0}, {1}, {2}, {3}, {4} ", list1, list2);

我得到一个例外：

Index (zero based) must be greater than or equal to zero and less than the size of the argument list.

我所做的就是创建一个临时列表

var temp = new List<string>();
temp.AddRange(list1);
temp.AddRange(list2);
sb.AppendFormat(" {0}, {1} ,{2}  ,{3}  ,{4} ", new List().Add);

有没有更优雅的方法来做到这一点？

Answer 1

试试这个：

var sb = new StringBuilder();
var list1 = new List<string>() {"a", "b", "c"};
var list2 = new List<string>() {"d", "e"};
sb.AppendFormat(" {0}, {1}, {2}, {3}, {4} ", list1.Concat(list2).ToArray());
Console.WriteLine(sb.ToString());

Answer 2

您可以像这样简单地做一些事情：

var result = string.Join(",", list1.Concat(list2));

您可以像这样将其附加到字符串生成器：

sb.Append(result);

Stringbuilder 从多个数组追加表单

Stringbuilder append form from multiple arrays

c#

string

stringbuilder

string-formatting