解决查询条件中in项目超过1000的情况(改用or)

核心处理方法如下:

int num = 0, pos = 0, startPos = 0;
               foreach (char c in tmpIn)
                {
                    if (',' == c) num++;
                    if ((num + 1) % 800 == 0 && c == ',')
                   {
                       ctrlIn = ctrlIn + inCode + " in ('" + tmpIn.Substring(startPos, pos - startPos).Replace(",", "','") + "' ) or ";
                        startPos = pos + 1;
                   }
                    pos++;
                }

tmpIn:传入的in参数
CtrlIn为字符串" and ("

此种方法比较慢，一个字符一个字符的查找，找到逗号后，还要计算。。。

后改用此方法：

do
{
                    ctrlIn = ctrlIn + inCode + " in ('" + string.Join("','", mParam, startPos, sCount) + "' )or ";
                    startPos = startPos + sCount;
                    inLength = inLength - sCount;
 } while (inLength > sCount);