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Delphi(Pascal) code:
try
szSelected:= dbgrdShowData.SelectedField.Text;
except
MessageBox(Handle,'»¹Ã»ÓÐÑ¡ÔñÒª²é¿´µÄÐÅÏ¢£¬ÇëÑ¡Ôñ','´íÎó',MB_ICONERROR);
end;
dbgrdShowDataÊÇÒ»¸öDBGrid£¬ÎÒÏ£ÍûµÃµ½ËûÑ¡ÖеÄCellµÄÐÅÏ¢£¬Èç¹ûÕâ¸öʱºòdbgrdShowDataÀïÃæÃ»ÓÐÊý¾Ý»òÕßÊÇÓû§Ã»ÓнøÐÐÑ¡Ôñ£¬¾Íµ¯³öÒ»¸ö´íÎóÌáʾ¿ò£¬ÎªÊ²Ã´¸ù±¾²»ÐУ¿²»ÊdzöÏÖÒì³£»áתÈëexcept½øÐд¦ÀíµÄô£¿Ôõô»¹Êǵ¯³öϵͳµÄÄǸö´íÎó¿òµÄ°¡£¬
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Debugger Exception Notification
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Project ExamInfoManager.exe raised exception class EAccessViolation with message 'Access violation at address 0047F73D in module 'ExamInfoManager.exe'. Read of address 000000D2'. Process stopped. Use Step or Run to continue.
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OK Help
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