BindingSource.Filter 如何实现模糊查询
希望通过Filter属性进行过滤
BindingSource.Filter = "%p"; //ok
BindingSource.Filter = "%p%"; //ok
BindingSource.Filter = "%p%c%"; //wrong，提示表达式错误
如果希望进行第三种方式的模糊查询，应该怎么办？
[解决办法]
刚才用Reflector看了下微软的实现，可以看出来的确不允许中间有通配符。
internal string AnalizePattern(string pat) { int length = pat.Length; char[] destination = new char[length + 1]; pat.CopyTo(0, destination, 0, length); destination[length] = '\0'; string str = null; char[] chArray2 = new char[length + 1]; int num3 = 0; int num4 = 0; int index = 0; while (index < length) { if ((destination[index] == '*') || (destination[index] == '%')) { while (((destination[index] == '*') || (destination[index] == '%')) && (index < length)) { index++; } if (((index < length) && (num3 > 0)) || (num4 >= 2)) { throw new Exception("ExprException.InvalidPattern(pat);"); } num4++; } else if (destination[index] == '[') { index++; if (index >= length) { throw new Exception("ExprException.InvalidPattern(pat);"); } chArray2[num3++] = destination[index++]; if (index >= length) { throw new Exception("ExprException.InvalidPattern(pat);"); } if (destination[index] != ']') { throw new Exception("ExprException.InvalidPattern(pat);"); } index++; } else { chArray2[num3++] = destination[index]; index++; } } str = new string(chArray2, 0, num3); if (num4 == 0) { kind = 4; return str; } if (num3 > 0) { if ((destination[0] == '*') || (destination[0] == '%')) { if ((destination[length - 1] == '*') || (destination[length - 1] == '%')) { kind = 3; return str; } kind = 2; return str; } kind = 1; return str; } kind = 5; return str; }