Error : Input string was not in a correct format

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1.00/5 (2 votes)

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C#

LINQDataContext db = new LINQDataContext();
ClassRoom cr = new ClassRoom();
cr.IdClassRoom = int.Parse(TxtId.Text);
cr.NameClassRoom = TxtName.Text;
cr.IdEducationGroup = int.Parse(ComboboxEducationGroup.ValueMember.ToString());
cr.MinCapacity = int.Parse(TxtMinCapacity.Text);
cr.MaxCapacity = int.Parse(TxtMaxCapacity.Text);
db.ClassRooms.InsertOnSubmit(cr);
db.SubmitChanges();

Posted 8-Jul-14 12:33pm

Member 10728784

Updated 8-Jul-14 16:04pm

DamithSL

v3

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[no name] 8-Jul-14 18:51pm

Use int.TryParse instead.

[no name] 8-Jul-14 21:28pm

On which line it's throwing error. For that textbox you have to check that the inputs char only integer or not... Then make a validation from client side

2 solutions

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George Jonsson · Answer 1 · 2014-07-08T15:36:00

Solution 1

You can try this

C#

cr.IdClassRoom = int.Parse(String.IsNullOrEmpty(TxtId.Text) ? "0" : TxtId.Text);

It will give you the default value 0 if the Text property is empty.
Do that for all your text boxes.

Posted 8-Jul-14 15:36pm

George Jonsson

Abhinav S · Answer 2 · 2014-07-08T15:37:00

Solution 2

int.Parse(TxtId.Text);
This line is probably throwing an error.
If you try and parse a non-integer value into an integer, you will get an error.

To avoid these erros, try and use Int.TryParse[^].
This can confirm if the value is an integer before parsing it into an integer variable.

Posted 8-Jul-14 15:37pm

Abhinav S

v2