Cannot Convert string to class type

[Queen Soso]

hi there,

When I run this line I get an error:

obj.number_type = dropdownlist1.s electedItem.val ue;

number_type is a class type and I want to put a string value in it from a drop down list.

this is the error:

Cannot implicitly convert type to 'TEL.MODEL.TEL_ T_NUMBER_TYPE.
please help :(

[tlhintoq]

number_type is a class type

Then you need to add a property to your Number_Type class to receive the string

obj.number_type .TelType

[Queen Soso]

I tried that but it gives me this error:

Input String was not in correct Format

:(

[tlhintoq]

I think you were/are on the right track.
The error message is telling you that it doesn't know how to convert your type "Tel.Model.Tel_ T_Number_type" to a string.
You need to do that, then send that string to your class.

Probably something like:
obj.number_type .TelType = dropdownlist.se lecteditem.valu e.ToString();

[Queen Soso]

I tried that it gives me the same error ...

[ThatThatGuy]

Hey... do this thing

obj.number_type =dropdownlist1. SelectedItem.To String();

[Queen Soso]

I did that it gives the same error,,,,

[cloud255]

Could you post the entire class definition for 'number_type'?
If I understand the situation correctly, you have an object called obj one of its members is a number_type object. This object you say is a class. If this is correct the code will never work. C# does not know how to change a string into a number_type (which you defined).

Try instead to add a string variable to the obj class and assign the value to that variable.

[Queen Soso]

obj is an object of a class called TEL_T_NUMBER, this is how I created it:
TEL_T_NUMBER obj = new TEL_T_NUMBER();

Then I used TEL_T_NUMBER properties in this obj like:
obj.Number_ID = Convert. ToInt32(textbox 1.text);

one of these propreties is number_type which is another class connected to this class and therefore it's treated as a property of TEL_T_NUMBER class.

I hope you get it...

[cloud255]

one of these propreties is number_type which is another class connected to this class and therefore it's treated as a property of TEL_T_NUMBER class.

I hope you get it...

That is exactly what I said earlier, you have a class number_type as a property, but the number_type cannot have a string directly assigned to it BECAUSE it is a class. C# does not know how to convert a string into an instance of your custom class.

Does number_type have a string property as a member? If so you can assign the value to that member:

obj.number_type.MyString = dropdownlist1.selectedItem.value;

[Queen Soso]

okay I created a string property to the number_type class, i did this:

obj.number_type .myValue = dropdownlist1.s electedItem.val ue;

the right side now is a string but it gives this error:
Input String was not in correct Format

What to do now?

[Frinavale]

Did you try using DropDownList.Se lectedValue Property. Make sure that the Selected Value is a String...if it isn't then you'll run into this problem.

-Frinny

[Queen Soso]

it is a string, both sides are string...

[Frinavale]

Obviously it's not a string as you expect it to be.
Are you sure that the Selected Value is not Null?

-Frinny

[Queen Soso]

its not null i connected the dropdownlist with a table from the database.