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Unable to cast object of type 'System.DBNull' to type 'System.String`
...accountNumber == DBNull.Value) ? string.Empty : accountNumber.ToString()
EDIT: Haven't paid attention to ExecuteScalar. It does really return null if the field is absent in the return result. So use instead:
return (accountNumber == null) ? string.Empty : accountNumber.ToString()
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Calculate the median of a billion numbers
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edited Apr 3 '10 at 14:56
answered Apr 3 '10 at 14:15
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Is it feasible to compile Python to machine code?
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edited Jul 3 '17 at 13:45
Janus Troelsen
16.7k1010 gold badges117117 silver badges172172 bronze badges
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sql server #region
can i create regions in sql server editor (like #region and #endregion in C#) ?
8 Answers
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How to export/import PuTTy sessions list?
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Export
cmd.exe, require elevated prompt:
Only sessions:
regedit /e "%USERPROFILE%\Desktop\putty-sessions.reg" HKEY_CURRENT_USER\Software\SimonTatham\PuTTY\Sessions
All settings:
regedit /e "%USERPROFILE%\Desktop\putty.reg" HKEY_CURRENT_USER\Software\SimonTatham
Powershell:
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Dismissing a Presented View Controller
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edited Dec 1 '17 at 2:27
answered Jan 31 '13 at 23:29
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Change the URL in the browser without loading the new page using JavaScript
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edited Apr 7 '14 at 16:35
community wiki
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Programmatically generate video or animated GIF in Python?
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edited Jul 21 '16 at 4:03
Matt Bierner
29.1k66 gold badges8585 silver badges125125 bronze badges
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Calculating moving average
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edited Aug 11 '17 at 20:04
Frank
62.4k88 gold badges8181 silver badges157157 bronze badges
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Create a custom event in Java
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edited Jun 3 '17 at 15:58
Joel eldo
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answered Jun 7 '11 at 1...