พิมพ์พวกสระไม่ได้ใน textbox ช่วยดูโค้ดด้วยคับ คือว่า textbox ตัวนี้รับเป็นชื่อคนอ่ะคับ

using System.Text.RegularExpressions;

public string CommandString
{
    get { return sqlCommandString; }
    set 
    {
        string commandString = value;

        string SmallDateTimePattern = "[sS][mM][aA][lL][lL][dD][aA][tT][eE][tT][iI][mM][eE]\\([@][0-9a-zA-Z\\s]{1,}\\)";
        Regex SmallDateTimeRgx = new Regex(SmallDateTimePattern);

        foreach (Match SmallDateTimeMatchCase in SmallDateTimeRgx.Matches(commandString))
        {
            string MatchCasePattern = "^[sS][mM][aA][lL][lL][dD][aA][tT][eE][tT][iI][mM][eE]";
            Regex MatchCaseRgx = new Regex(MatchCasePattern);
            Match RemoveMatch = MatchCaseRgx.Match(SmallDateTimeMatchCase.Value);
            string TempMatchCase = SmallDateTimeMatchCase.Value.Replace(RemoveMatch.Value, "");

            commandString = commandString.Replace(SmallDateTimeMatchCase.Value, TempMatchCase.Replace("(", "Convert(SmallDateTime, ").Replace(")", ", 103)"));
        }

        sqlCommandString = commandString;
        sqlCommand = new SqlCommand(sqlCommandString, sqlConnection);
    }
}