Solution for setting invalid dataformatstring in gridview

If you directly set dataformatstring to {0: d}, you will not see the expected results.
Set the value to false in htmlencode.
PS:
The syntax of the dataformatstring attribute is as follows:

Dataformatstring = "{0: Format String }"

We know that {0} In dataformatstring represents the data itself, while the format string after the colon represents the format that we want the data to display; in addition, after the specified format symbol, you can specify the number of digits to be displayed in decimal places. For example, if the original data is "1.56" and the format is set to {0: N1}, the output is "1.5 」. The common numeric format is shown in the following table:

Format String input result
"{0: c}" 12345.6789 $12,345.68
"{0: c}"-12345.6789 ($12,345.68)
"{0: d}" 12345 12345
"{0: D8}" 12345 00012345
"{0: e}" 12345.6789 1234568e + 004
"{0: E10 }" 12345.6789 1.2345678900e + 004
"{0: F }" 12345.6789 12345.68
"{0: F0 }" 12345.6789 12346
"{0: g}" 12345.6789 12345.6789
"{0: G7}" 123456789 1.234568e8
"{0: n}" 12345.6789 12,345.68
"{0: N4}" 123456789 123,456,789.0000
"Total: {0: c}" 12345.6789 total: $12345.68

The commonly used date formats are shown in the following table:

format description output format
D simplified Date Format mm/DD/YYYY
D detailed Date Format dddd, Mmmm DD, yyyy
F full format (long date + short time) dddd, Mmmm DD, yyyy hh: mm
F
full Date and Time Format
(long date + long time)
dddd, Mmmm DD, yyyy hh: mm: SS
G General Format (short date + short time) mm/DD/YYYY hh: mm
G General Format (short date + long time) mm/DD/YYYY hh: mm: SS
M, M month/day format mmmm DD
S moderate Date Format yyyy-mm-dd hh: mm: SS
T simplified time format hh: mm
T detailed time format hh: mm: SS