执行update, insert,delete 语句, 不返回结果集,(类型化参数)
/// <summary>
/// 执行update, insert,delete 语句, 不返回结果集,(类型化参数)
/// </summary>
/// <param name="connString">连接字符串</param>
/// <param name="sql">待执行的sql语句</param>
/// <param name="errMsg">如果成功执行,返回受影响的行数, 如果执行失败, 返回错误信息</param>
/// <param name="paras">传递给查询的参数</param>
/// <returns>成功执行返回true, 否则返回false</returns>
public static bool ExecSql(string connString, string sql, out string errMsg, params object[] paras)
{
return DB.ExecSql(connString, DB.GetParametricSql(sql, paras), out errMsg);
}
private static string GetParametricSql(string sql, object[] paras)
{
sql = sql.Replace("'", "''");
sql = "EXEC sp_executesql N'" + sql + "'" + DB.ParseSqlArgument(paras);
return sql;
}
/// <summary>
/// 参数化ExecSql 函数调用的子函数, 它把对象参数转换成字符串
/// </summary>
/// <param name="paras"></param>
/// <returns></returns>
private static string ParseSqlArgument(object[] paras)
{
if (paras == null || paras.Length < )
{
return "";
}
string text = ",N'";
string text2 = ",";
int num = ;
for (int i = ; i < paras.Length; i++)
{
object obj;
if (paras[i] is Tuple<int, object>)
{
num = (paras[i] as Tuple<int, object>).Item1;
obj = (paras[i] as Tuple<int, object>).Item2;
}
else
{
obj = paras[i];
}
string text3 = "@p" + num.ToString();
num++;
if (obj == null)
{
throw new Exception("Null argument is not allowed.");
}
if (obj is string)
{
string text4 = obj as string;
text4 = text4.Replace('\'', ''');
object obj2 = text;
text = string.Concat(new object[]
{
obj2,
text3,
" nvarchar(",
(text4.Length > ) ? text4.Length : ,
"),"
});
string text5 = text2;
text2 = string.Concat(new string[]
{
text5,
text3,
"='",
text4,
"',"
});
}
else if (obj is int)
{
int num2 = (int)obj;
text = text + text3 + " int,";
string text6 = text2;
text2 = string.Concat(new string[]
{
text6,
text3,
"=",
num2.ToString(),
","
});
}
else if (obj is float)
{
float num3 = (float)obj;
text = text + text3 + " float,";
string text7 = text2;
text2 = string.Concat(new string[]
{
text7,
text3,
"=",
num3.ToString(),
","
});
}
else if (obj is double)
{
double num4 = (double)obj;
text = text + text3 + " real,";
string text8 = text2;
text2 = string.Concat(new string[]
{
text8,
text3,
"=",
num4.ToString(),
","
});
}
else if (obj is decimal)
{
decimal num5 = (decimal)obj;
string text9 = text;
text = string.Concat(new string[]
{
text9,
text3,
" decimal(18,",
StringTool.GetSectionValue(num5.ToString(), ".", ).Length.ToString(),
"),"
});
string text10 = text2;
text2 = string.Concat(new string[]
{
text10,
text3,
"=",
num5.ToString(),
","
});
}
else if (obj is DateTime)
{
DateTime dateTime = (DateTime)obj;
text = text + text3 + " datetime,";
string text11 = text2;
text2 = string.Concat(new string[]
{
text11,
text3,
"='",
dateTime.ToString("yyyy-MM-dd HH:mm:ss.fff"),
"',"
});
}
else
{
if (!(obj is char))
{
throw new Exception("The data type is not supported currently,please notify the author of this function this error.");
}
char c = (char)obj;
text = text + text3 + " char(1),";
string text12 = text2;
text2 = string.Concat(new string[]
{
text12,
text3,
"='",
c.ToString(),
"',"
});
}
}
text = text.Substring(, text.Length - ) + "'";
text2 = text2.Substring(, text2.Length - );
return text + text2;
}
/// <summary>
/// 取得一个由分隔符分隔的字符串的分段信息. 如果参数不合法, 将取最接近的值返回,而不返回错误信息
/// </summary>
/// <param name="input"></param>
/// <param name="sep"></param>
/// <param name="section">从0开始编号的段号</param>
/// <returns></returns>
public static string GetSectionValue(string input, string sep, int section)
{
string[] array = StringTool.Split(input, sep);
if (section >= array.Length)
{
return "";
}
return array[section];
}
/// <summary>
/// 根据分割符将字符串割成数组,如果参数非法,返回一个长度为1,首元素为母串的数组,
/// 如果母串为null, 则首元素为空串, 不会返回null值.
/// </summary>
/// <param name="input">母串</param>
/// <param name="sep">分割符</param>
/// <returns>返回分割后的数组</returns>
public static string[] Split(string input, string sep)
{
if (input == null || sep == null || input == "" || sep == "" || input.IndexOf(sep) < )
{
return new string[]
{
input ?? ""
};
}
return input.Split(new string[]
{
sep
}, StringSplitOptions.None);
}
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