Wpf/C#: convert.toint32 (observablecollection, add int item)

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Hello everyone!

How can I convert this string to Int32?

C#

ExampleCollection = new ObservableCollection<MyClass>();
ExampleCollection.Add(new LicenseHolder() { MyString1 = "StringName1" });
ExampleCollection.Add(new LicenseHolder() { MyString2 = "StringName2" });
ExampleCollection.Add(new LicenseHolder() { MyInt1 = "StringName3" });

= CS0029 Cannot implicitly convert type 'string' to 'int'

What I have tried:

Update
I thought I had tried this, but apparently not:

C#

LicenseHolders.Add(new LicenseHolder() 
    { MyInt = Convert.ToInt32("MyString" )});

(no squiggly).

But when I run the code, it gives me the following error:

System.FormatException: 'Input string was not in a correct format.'

I am trying to add items to an ObservableCollection instance. How can I rectify this?

Posted 23-Jun-21 11:20am

Flidrip

Updated 23-Jun-21 22:41pm

v3

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Peter_in_2780 23-Jun-21 20:17pm

You are trying to convert the string "IntName1" to an Int32?? What Int32 result do you expect?

Flidrip 24-Jun-21 2:01am

Typos -- fixed.

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TheRealSteveJudge · Answer 1 · 2021-06-23T20:10:00

I would like to recommend this article: How to convert string to int in C#?[^]

The safest method of converting a string to e.g. an int is the

TryParse()

method.

You can only convert strings to numeric values if they represent a number e.g. "1234".
"abc1234" for example cannot be converted to a number.

Richard MacCutchan · Answer 2 · 2021-06-23T22:41:00

You are still trying to convert a string of alphabetic characters to an integer.

C#

LicenseHolders.Add(new LicenseHolder() 
    { MyInt = Convert.ToInt32("MyString" )});

What numeric value do you expect to get from "MyString"?

Also, do not use Convert, as it crashes your app, use TryParse so you can catch the bad inputs.

Wpf/C#: convert.toint32 (observablecollection, add int item)

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