Help me to get text from Combobox.

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Hi Friend,

If I use following code then I get error (Additional information: InvalidArgument=Value of '2' is not valid for 'index'.)

VB

Dim index1 As Integer = 0
Dim email As String = ComboBox1.Items.Item(index1).ToString
index1 = index1 + 1

But If I manually put index like 0 or something else then it works. Like following code works

VB

Dim email As String = ComboBox1.Items.Item(0).ToString

Please tell me what's the problem is?

Posted 25-Jun-14 1:42am

zubair30

Updated 25-Jun-14 1:44am

Thomas Daniels

v2

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Comments

Thomas Daniels 25-Jun-14 7:45am

Do you use your code in a loop? If so, can you provide your entire loop?

zubair30 25-Jun-14 7:45am

I am using a timer

5 solutions

Solution 1

string s = ((yourItemType)yourComboBox.SelectedItem).yourWishProperty; in C#

In this case

Dim email As String = ((string)ComboBox1.SelectedItem).text

Posted 25-Jun-14 1:49am

SibeeshKV

Solution 2

Use this

VB

Dim index1 As Integer = 0

outside of your function and make your variable public and then use it

Posted 25-Jun-14 1:49am

KaushalJB

Solution 7

Thanks Guys

My increment was the problem and got it fixed.

Thanks to all friends.

Posted 25-Jun-14 2:07am

zubair30

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Thomas Daniels · Accepted Answer · 2014-06-25T01:51:00

If you use a timer, then index1 becomes probably higher than the highest index of Items. Before you try to get the item from the combobox, check whether it is possible:

VB.NET

If ComboBox1.Items.Count > index1 Then
    Dim email As String = ComboBox1.Items.Item(index1).ToString
    index1 = index1 + 1
Else
    ' index1 is higher than the highest index of the combobox items
End If

OriginalGriff · Accepted Answer · 2014-06-25T01:52:00

At a guess, that isn't your code: I suspect that index1 is declared outside the method, which means that the value is preserved between executions.

So it you are using a timer as you say, the first Tick event will find index1 contains zero, the second fill find one, and so on.

Why would you increment the index in a timer without checking if the value is still inside the bounds of the combobox items?