Question

C# 拼接字符串

如何将 1 2 .... 拼成('1','2',....)

Answer 1

string str = "123";
str.ToArray();
StringBuilder strn = new StringBuilder();
for (int i = 0; i < str.Length; i++)
{
strn.Append(str[i]);
if (i < str.Length - 1)
{
strn.Append(",");
}
}
Console.WriteLine(strn.ToString());
你是要这样的嘛

Answer 2

int[] num = new int[]{1,2,3,4....};
string str = string.Empty;
for(int i = 0; i < num.Length;i ++)
{
if(i == 0)

{
str += "('" + num[i] + "',";

}

else

{
str += "'" + num[i] + "',"

}
}
截取掉最后一个逗号，再拼接上最后一个括号

Answer 3

c = a + b;
希望对你能有所帮助。