Datetime TempData error in C# .NET Core 6 and razor page

Question

Datetime TempData error in C# .NET Core 6 and razor page

Remi 0

TempData["abc"] = "2023-12-12" ;

TempData["abc_raw"] = "2023-12-12 10:10:00 PM";

return RedirectToPage();

The two are the same, but there is a problem with TempData["abc"].

"abc" cause

System.InvalidCastException: Unable to cast object of type 'System.DateTime' to type 'System.String'.

Datetime to string cast error

So I temporarily used "abc" by serializing

TempData["abc"] = JsonSerializer.Serialize(TempData["abc"]);

Remi 0 Reputation points

2023-12-20T02:29:55.05+00:00

I also declared

[TempData]

public string abc {get;set;}
Anonymous

2023-12-20T03:22:28.66+00:00

Hi @Remi, could you pls also share your frontend page code? I cannot see any related Datetime type variables in your shared code. Where does this error occur, in frontend or backend? If you are not clear about this, you can share the screenshot for the error.

Remi 0

public class TestModel: PageModel
{

[TempData]
public string abc { get;set;}

[TempData]
public string abc_raw {get;set;}

public async Task<IActionResult> OnPostAsync( )
{
	abc = "2023-12-12"; // this caused cast error
	abc_raw = "2023-12-12 오전 10:00:00"; // this is fine
	return RedirectToPage();
}	
}

When saving abc in this way, it was saved in DateTime Object format, not string. There is only one line of code where abc is used.

AgaveJoe 30,126 Reputation points

2023-12-20T15:27:46.4733333+00:00

I cannot reproduce the problem with the code provided.

Your answer

Remi 0 Reputation points

2023-12-20T02:29:55.05+00:00

I also declared

[TempData]

public string abc {get;set;}
Anonymous

2023-12-20T03:22:28.66+00:00

Hi @Remi, could you pls also share your frontend page code? I cannot see any related Datetime type variables in your shared code. Where does this error occur, in frontend or backend? If you are not clear about this, you can share the screenshot for the error.
Remi 0 Reputation points

2023-12-20T12:57:03.1333333+00:00

public class TestModel: PageModel { [TempData] public string abc { get;set;} [TempData] public string abc_raw {get;set;} public async Task<IActionResult> OnPostAsync( ) { abc = "2023-12-12"; // this caused cast error abc_raw = "2023-12-12 오전 10:00:00"; // this is fine return RedirectToPage(); } }

When saving abc in this way, it was saved in DateTime Object format, not string. There is only one line of code where abc is used.
AgaveJoe 30,126 Reputation points

2023-12-20T15:27:46.4733333+00:00

I cannot reproduce the problem with the code provided.

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Datetime TempData error in C# .NET Core 6 and razor page

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