Auto Increament value contain string and number in C# and VB.Net

Hi ruben00000,

Please refer the below code.

HTML

<form id="form1" runat="server">
    <asp:Label ID="lblRev" runat="server"></asp:Label>
</form>

Code:

C#

 protected void Page_Load(object sender, EventArgs e)
 {
     int a = 1;
     string a1 = "ABC";
     string b = string.Format("INV/{0}/202408{1}-001", a1, a);
     string id = b.Split('-')[1];
     lblRev.Text = string.Format("{0}-{1}", b.Split('-')[0], (Convert.ToInt32(id) + 1).ToString().PadLeft(3, '0'));
 }

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    Dim a As Integer = 1
    Dim a1 As String = "ABC"
    Dim b As String = String.Format("INV/{0}/202408{1}-001", a1, a)
    Dim id As String = b.Split("-"c)(1)
    lblRev.Text = String.Format("{0}-{1}", b.Split("-"c)(0), (Convert.ToInt32(id) + 1).ToString().PadLeft(3, "0"c))
End Sub

Screenshot