Nh123 Nh123 - 1 month ago 18
Vb.net Question

Convert hex color string to RGB color

I want to convert hex color to RGB color.

I used the following code:

Me.BackColor = RGB("#000000")


But then it throws the following exception:

Argument not specified for parameter 'Green' of 'Public Function RGB(Red As Integer, Green As Integer, Blue As Integer) As Integer'


What is the right way to do it?

Answer

By ColorTranslator:

ColorTranslator.FromHtml("#003399") 

Other Ways:

Public Function ConvertToRbg(ByVal HexColor As String) As Color
    Dim Red As String
    Dim Green As String
    Dim Blue As String
    HexColor = Replace(HexColor, "#", "")
    Red = Val("&H" & Mid(HexColor, 1, 2))
    Green = Val("&H" & Mid(HexColor, 3, 2))
    Blue = Val("&H" & Mid(HexColor, 5, 2))
    Return Color.FromArgb(Red, Green, Blue)
End Function

or:

Public Shared Function HexToColor(ByVal hexColor As String) As Color
    If hexColor.IndexOf("#"c) <> -1 Then
        hexColor = hexColor.Replace("#", "")
    End If
    Dim red As Integer = 0
    Dim green As Integer = 0
    Dim blue As Integer = 0
    If hexColor.Length = 6 Then
        red = Integer.Parse(hexColor.Substring(0, 2), NumberStyles.AllowHexSpecifier)
        green = Integer.Parse(hexColor.Substring(2, 2), NumberStyles.AllowHexSpecifier)
        blue = Integer.Parse(hexColor.Substring(4, 2), NumberStyles.AllowHexSpecifier)
    ElseIf hexColor.Length = 3 Then
        red = Integer.Parse(hexColor(0).ToString() + hexColor(0).ToString(), NumberStyles.AllowHexSpecifier)
        green = Integer.Parse(hexColor(1).ToString() + hexColor(1).ToString(), NumberStyles.AllowHexSpecifier)
        blue = Integer.Parse(hexColor(2).ToString() + hexColor(2).ToString(), NumberStyles.AllowHexSpecifier)
    End If
    Return Color.FromArgb(red, green, blue)
End Function

or:

    Dim c As String = "#ffffff"
    c = Replace(c, "#", "")
    c = "&H" & c
    ColorTranslator.FromOle(c)

or:

Public Function hexToRbgNew(ByVal Hex As String) As Color
    Hex = Replace(Hex, "#", "")
    Dim red As String = "&H" & Hex.Substring(0, 2)
    Hex = Replace(Hex, red, "", , 1)
    Dim green As String = "&H" & Hex.Substring(0, 2)
    Hex = Replace(Hex, green, "", , 1)
    Dim blue As String = "&H" & Hex.Substring(0, 2)
    Hex = Replace(Hex, blue, "", , 1)
    Return Color.FromArgb(red, green, blue)
End Function
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