Error on datagridview show the "format string can be only "G", "g", "X", "x", "F", "f", "D" or "d"."

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I have datagridview when display data on datagridview i get error

The "Format String can be only "G", "g", "X", "x", "F", "f", "D" or "d"."

i debug after that get stacktrace that show more details about error as following :

at System.Enum.ToString(String format)
  at System.Enum.ToString(String format, IFormatProvider provider)
  at System.Windows.Forms.Formatter.FormatObjectInternal(Object value, Type targetType, TypeConverter sourceConverter, TypeConverter targetConverter, String formatString, IFormatProvider formatInfo, Object formattedNullValue)
  at System.Windows.Forms.Formatter.FormatObject(Object value, Type targetType, TypeConverter sourceConverter, TypeConverter targetConverter, String formatString, IFormatProvider formatInfo, Object formattedNullValue, Object dataSourceNullValue)
  at System.Windows.Forms.DataGridViewCell.GetFormattedValue(Object value, Int32 rowIndex, DataGridViewCellStyle& cellStyle, TypeConverter valueTypeConverter, TypeConverter formattedValueTypeConverter, DataGridViewDataErrorContexts context)

How to solve this error please ?

What I have tried:

The "Format String can be only "G", "g", "X", "x", "F", "f", "D" or "d"."

Posted 26-Aug-19 16:48pm

ahmed_sa

Updated 26-Aug-19 20:04pm

v2

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Patrice T 26-Aug-19 23:13pm

And you plan to show related code?
After 175+ questions, you should have learned.

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OriginalGriff · Answer 1 · 2019-08-26T19:45:00

At a guess - and a help vampire like yourself should know by now that without the relevant code that is all it can be - you are trying to set a format string on a enum field. When you do that, you can only use the formats it lists in the error message: Enum.ToString Method (System) | Microsoft Docs[^]

But then, if you had googled the error message for yourself, you would have found that link at the top of the list, just like I did ...

177 questions, and you still can't do a basic Google for yourself ... :sigh: