这个问题看看谁能帮给解决一下

Question

我现在得到一个string str = "15,2,4,6,1,31";现在要像里面加入一个数字假如所加上的数字要不是和上面重复的 如"11"，那么 str = "[color=#0000FF]11,15,2,4,6,1,31";[/color]要是有重复的比如说是"6" 那么 str = "[color=#0000FF]6,15,2,4,1,31";[/color]也就是将有重复的数字提到前面去这个应该怎么做呢？那位告诉我一下被！

Answer 1

先把字符串截取 放到一个数组中
再用你要插入的数字 和array[i]比较 
if(没有重复的)
{插入 }
else
{做一个类似冒泡排序的 }

Answer 2

                string value = "6,11,1";
                string[] arr = value.Split(',', StringSplitOptions.RemoveEmptyEntries);                List<string> lists = new List<string>(arr);
                string newValue = "4";
                if (lists.Contains(newValue))
                {
                    lists.Remove(newValue);
                    lists.Insert(0, newValue);
                }
                else
                {
                    lists.Insert(0, newValue);
                }                string retVal = string.Empty;
                foreach (string val in lists)
                {
                    retVal += val;
                    retVal += ",";
                }

Answer 3

indexOf来判断有没有？有就replace(),没有就直接加上去.....

Answer 4

string str1 = "6";
string str = "15,2,4,6,1,31";
string result = str1 + ("," + str + ",").Replace("," + str1 + ",", ",");
 Response.Write(result.Substring(0, result.Length - 1));    

Answer 5

 public string GetProcString(string newstr , string oldstr)
        {
            if (oldstr.Length > 0) { oldstr += ","; }
            if (oldstr.IndexOf(newstr + ",") != -1)
            {
                oldstr = oldstr.Replace(newstr + ",", "");
            }
            oldstr = newstr + "," + oldstr;
            return oldstr;
        }

Answer 6

oldstr = newstr + "," + oldstr;
修改为：
oldstr = newstr + "," + oldstr.Substring( 0,oldstr.Length-1);

Answer 7

public string GetProcString(string newstr , string oldstr)
        {
            if (oldstr.Length > 0) { oldstr = ","+oldstr+","; }
            if (oldstr.IndexOf(","+newstr + ",") != -1)
            {
                oldstr = oldstr.Replace("," + newstr + ",", ",");
            }
            oldstr = newstr + "," + oldstr.Substring( 1,oldstr.Length-2);
            return oldstr;
        }那就这样处理，前后都加逗号

Answer 8

replace的话，就不用判断了, 找不到，自然就不会替换。:D

Answer 9

oldstr.Substring(1,oldstr.Length-2);这里不严谨，楼主如果能确保刚开始oldstr有数据，就不用做判断了，如果oldstr可以为空，
那么oldstr= newstr+","+ oldstr.Substring(1,oldstr.Length-2);就修改为
if( oldstr == ""){
 oldstr = newstr;
}
else
{
   oldstr= newstr+","+ oldstr.Substring(1,oldstr.Length-2);
}

Answer 10

        private void button1_Click(object sender, EventArgs e)
        {
            String Str = string.Empty; 
            Str = textBox1.Text;   //这里面的值是 “1，2，3，4，5”
            if (Str.IndexOf(textBox2.Text) > 0)  //textbox2的值就是传过来的值
            {
                Str = Str.Replace("," + textBox2.Text, "");
            }
            if (Str != textBox1.Text)
            {
                textBox1.Text = Str + "," + textBox1.Text;
            }
        }