Startswith and endswith VB:NET

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Hi, I would like to check if textbox1 start with specific number and while end with specific number. I have a problem how to write it.
Thank you for help

What I have tried:

I try:

Dim a As String = "010.551" Or "008.880" Or "008.881" Or "009.701" Or "009.706" Or "009.925" Or "011.149" Or "011.150" Or "009.648"
            
Dim b As String = "1"


 If TextBox1.Text.StartsWith(a) & TextBox1.Text.EndsWith(b) Then

Posted 3-May-18 21:52pm

Member 13711215

Updated 3-May-18 22:05pm

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Comments

Richard MacCutchan 4-May-18 3:59am

Use your debugger to look at the above code and see exactly what gets stored in variable a.

Member 13711215 4-May-18 4:12am

ERROR: Conversion string to long is not valid

Member 13711215 4-May-18 4:16am

I edit it:
regcis is textbox1.text
and I replace & to andalso

Dim a As String = "010.551" Or "008.880" Or "008.881" Or "009.701" Or "009.706" Or "009.925" Or "011.149" Or "011.150" Or "009.648"
Dim b As String = "5"
If regCis.StartsWith(a) AndAlso regCis.EndsWith(b) Then

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Maciej Los · Answer 1 · 2018-05-03T22:07:00

1. Linq solution
You can use Enumerable.Any(TSource) Method (IEnumerable(TSource), Func(TSource, Boolean)) (System.Linq)[^] to determine whether any element of a sequence satisfies a condition, but you have to make some changes in your code:

VB.NET

Dim a As String() = {"010.551", "008.880", "008.881", "009.701", _
		"009.706", "009.925", "011.149", "011.150", "009.648"}
Dim b As String = "1"

Dim t As String = "010.551ASDJKA1" 'TextBox1.Text

Dim result = a.Any(Function(x) t.StartsWith(x) And t.EndsWith(b))
If result Then 'it is equal to result=True
    'TextBox1.Text starts with one of string in [a] and ends with "1" in [b]
    'further instructions
End If

2. Non-Linq solution: