C#•3y ago

How do I pass 1 argument in lambda expression?

string tempTitle = "whatever";

await Task.Run(async (tempTitle) => // here I am having some errors, no idea how to pass this tempTitle variable inside this task to avoid cross-thread exception
{
    Text = "Complete!";
    await Task.Delay(5000);
    Text = tempTitle;
});

string tempTitle = "whatever";

await Task.Run(async (tempTitle) => // here I am having some errors, no idea how to pass this tempTitle variable inside this task to avoid cross-thread exception
{
    Text = "Complete!";
    await Task.Delay(5000);
    Text = tempTitle;
});

Maybe I need to put Action<string> somewhere? Hmm

DaVinki•1/4/23, 6:12 AM

Task.Run doesn't accept an Action<T>

DaVinki•1/4/23, 6:14 AM

But you are able to use tempTitle inside of the function

DaVinki•1/4/23, 6:16 AM

Anonymous functions are able to use variables previously declared in scope but be careful about it

DDaVinki Anonymous functions are able to use variables previously declared in scope but b...

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❓𝙌𝙪𝙚𝙨𝙩𝙞𝙤𝙣 𝙈𝙖𝙧𝙠 🩷OP•1/4/23, 6:19 AM

Is that what you meant? Then I have unhandled exception

DaVinki•1/4/23, 6:21 AM

Is a variable you already declared?

DDaVinki Is `Text` a variable you already declared?

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❓𝙌𝙪𝙚𝙨𝙩𝙞𝙤𝙣 𝙈𝙖𝙧𝙠 🩷OP•1/4/23, 6:22 AM

No, this is a property of a form, Windows Forms framework

DaVinki•1/4/23, 6:23 AM

So what does the error say?

DDaVinki So what does the error say?

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❓𝙌𝙪𝙚𝙨𝙩𝙞𝙤𝙣 𝙈𝙖𝙧𝙠 🩷OP•1/4/23, 6:23 AM

As on the previous screenshot, Exception Unhandled Cross-thread operation not valid

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❓𝙌𝙪𝙚𝙨𝙩𝙞𝙤𝙣 𝙈𝙖𝙧𝙠 🩷OP•1/4/23, 6:24 AM

But you gave me something to wonder, it's not an issue with my string but accessing this "Text" property, I need to check if an invoke is required, hold on please

❓❓𝙌𝙪𝙚𝙨𝙩𝙞𝙤𝙣 𝙈𝙖𝙧𝙠 🩷But you gave me something to wonder, it's not an issue with my string but access...

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❓𝙌𝙪𝙚𝙨𝙩𝙞𝙤𝙣 𝙈𝙖𝙧𝙠 🩷OP•1/4/23, 6:38 AM

Yeah, that was my mistake and not issue with my string but accessing that "Text" property. Thanks @daVinki a lot! The above script works now and my program runs without cross-thread exception catpog