Insert a selected value from a combo-box (tinyint value) C#

Question

0.00/5 (No votes)

See more:

I'm trying to insert a selected value from a combo-box (Win forms)

I have two combo boxes that use different data type (Int and tinyint)

Data Type int is working

What I have tried:

For INT code is working
<pre>eventInfo.PersonDetailModuleID = Convert.ToInt32(cboPersonDetailModule.SelectedValue.ToString())

For TinyInt code is not working

eventInfo.ChildPersonDetailModuleID = Convert.ToByte(cboPersonDetailModuleChild.SelectedValue.ToString())

DAL

parms[2] = new SqlParameter("@PersonDetailModuleID", SqlDbType.Int, 4,ParameterDirection.Input, false, 0, 0, "", DataRowVersion.Proposed, businessObject.PersonDetailModuleID);
parms[3] = new SqlParameter("@ChildPersonDetailModuleID", SqlDbType.TinyInt,1, ParameterDirection.Input, false, 0, 0, "", DataRowVersion.Proposed, businessObject.ChildPersonDetailModuleID);

Error OR Warning:

FormatException was unhandled

An unhandled exception of type 'System.FormatException' occurred in mscorlib.dll

Input string was not in a correct format

Posted 18-Sep-18 4:21am

Mphirana

Updated 18-Sep-18 23:09pm

Add a Solution

2 solutions

Solution 2

Thank you OriginalGriff when I populate my combo box I used a wrong ValueMember primaryID from the combobox that use INT

I used

cboPersonDetailModuleChild.ValueMember = "PersonDetailModuleID";<pre>

instead of

cboPersonDetailModuleChild.ValueMember = "ChildPersonDetailModuleID";

Posted 18-Sep-18 23:10pm

Mphirana

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

OriginalGriff · Accepted Answer · 2018-09-18T04:41:00

Start with the debugger, and look at what is in your SelectedValue.

The documentation - Convert.ToByte Method (System) | Microsoft Docs[^] - says that the FormatException occurs when it contains a non-numeric value otehr than '-', or when the string is empty. So start with the debugger and check exactly what you are passing to Convert.ToByte.