public static string MakeSafeSql(this string s)
{
string t = s;
t = t.Replace("'", "''");
t = t.Replace("[", "[[]");
t = t.Replace("%", "[%]");
t = t.Replace("_", "[_]");
return t;
}
public static string ReplaceUnsafeSqlParameter(this string s)
{
string t = s;
t = t.Replace("[", "[[]");
t = t.Replace("%", "[%]");
t = t.Replace("_", "[_]");
return t;
}
/// <summary>
/// 比较2个字符串对象是否相等,区分大小写。
/// <remarks>2个字符串转换为小写字符进行比较</remarks>
/// </summary>
/// <param name="compareWith"></param>
/// <returns>若相等，则为True；反之为False</returns>
public static bool IsEqual(this string s, string compareWith)
{
if (compareWith == null)
{
return false;
}
if (s.ToLower().Trim() == compareWith.ToLower().Trim())
{
return true;
}
return false;
}
/// <summary>
/// 返回一个布尔值，指定两个字符串是否相等，不区分大小写。
/// </summary>
/// <param name="compareWith"></param>
/// <returns>若相等，则为True；反之为False。</returns>
public static bool IsEqualIgnoreCase(this string s, string compareWith)
{
return (s == compareWith) || StringComparer.OrdinalIgnoreCase.Compare(s, compareWith) == 0;
}
/// <summary>
/// 将指定字符串的首字母转换为大写字符
/// </summary>
/// <param name="s"></param>
/// <returns></returns>
public static string UpperFirstChar(this string s)
{
if (s.Trim().Length == 0)
{
return s;
}
string result = string.Empty;
string[] tmp = s.Split(' ');
for (int i = 0; i < tmp.Length; i++)
{
result += Upper(tmp[i]);
if (tmp.Length == 1 || i == tmp.Length - 1)
{
}
else
{
result += " ";
}
}
return result;
}
private static string Upper(this string s)
{
if (s.Length == 0) return s;
char[] array = s.ToCharArray();
string result = string.Empty;
for (int i = 0; i < s.Length; i++)
{
if (i == 0)
{
result += array[i].ToString().ToUpper();
}
else
{
result += array[i].ToString().ToLower();
}
}
return result;
}
[Obsolete("These helper methods have been merged in to string, please use string.MakeSafeSql() to instead")]
public static string MakeSafeSql(string inputSQL)
{
string s = inputSQL;
s = inputSQL.Replace("'", "''");
s = s.Replace("[", "[[]");
s = s.Replace("%", "[%]");
s = s.Replace("_", "[_]");
return s;
}
/// <summary>
/// 由于系统提供比较字符串只有一个空格时，会认为比较的字符串不为空。
/// 该方法是对系统方法的一个补充，即传入字符串有且只有一个空格时，验证字符串为空；
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public static bool IsNullOrEmpty(string input)
{
if (input == null)
return true;
if (input.Trim().Length == 0 )
{
return true;
}
return false;
}
/// <summary>
/// 比较2个字符串对象是否相等,区分大小写。
/// <remarks>2个字符串转换为小写字符进行比较</remarks>
/// </summary>
/// <param name="input1"></param>
/// <param name="input2"></param>
/// <returns>若相等，则为True；反之为False</returns>
public static bool AreEqual(string input1, string input2)
{
if (input1 == null && input2 == null)
{
return true;
}
if (input1 == null || input2 == null)
{
return false;
}
if (input1.ToLower().Trim() == input2.ToLower().Trim())
{
return true;
}
return false;
}
/// <summary>
/// 返回一个布尔值，指定两个字符串是否相等，不区分大小写。
/// </summary>
/// <param name="strA"></param>
/// <param name="strB"></param>
/// <returns>若相等，则为True；反之为False。</returns>
public static bool AreEqualIgnoreCase(string input1, string input2)
{
return (input1 == input2) || StringComparer.OrdinalIgnoreCase.Compare(input1, input2) == 0;
}
/// <summary>
/// 将指定字符串的首字母转换为大写字符
/// </summary>
/// <param name="s"></param>
/// <returns></returns>
[Obsolete("These helper methods have been merged in to string, please use string.UpperFirstChar() to instead")]
public static string UpperFirstChar(string s)
{
if (TrimString(s) == null || s.Length == 0)
return s;
string result = string.Empty;
string[] tmp = s.Split(' ');
for (int i = 0; i < tmp.Length; i++)
{
result += Upper(tmp[i]);
if (tmp.Length == 1 || i == tmp.Length - 1)
{
}
else
{
result += " ";
}
}
return result;
}
[Obsolete("These helper methods have been merged in to string, please use string.Upper() to instead")]
private static string Upper(string s)
{
if (s == null || s.Length == 0)
return s;
char[] array = s.ToCharArray();
string result = string.Empty;
for (int i = 0; i < s.Length; i++)
{
if (i == 0)
{
result += array[i].ToString().ToUpper();
}
else
{
result += array[i].ToString().ToLower();
}
}
return result;
}
/// <summary>
/// 去掉字符串的前后空格。当字符串为null时，返回null
/// </summary>
/// <param name="s"></param>
/// <returns></returns>
public static string TrimString(string s)
{
return s == null ? null : s.Trim();
}