Change ASP.Net HyperLink NavigateUrl inside Repeater based on condition using C# and VB.Net

Hi ramco1917,

Please refer below sample.

SQL

CREATE TABLE [DataSet]
(
    [Source] VARCHAR (20),
    [InvoiceNumber] VARCHAR (20)
)
INSERT INTO [DataSet] VALUES ('Amazon','2315642')
INSERT INTO [DataSet] VALUES ('' ,'6584520')
INSERT INTO [DataSet] VALUES ('Others','8942315')
INSERT INTO [DataSet] VALUES ('Amazon','0325412')
INSERT INTO [DataSet] VALUES (NULL ,'6584522')

HTML

<asp:Repeater ID="rptDetails" runat="server" OnItemDataBound="rptDetails_ItemCommand">
<HeaderTemplate>
    <table>
        <tr>
            <td>Source</td>
            <td>InvoiceNumber</td>
        </tr>
</HeaderTemplate>
<ItemTemplate>
    <tr>
        <td><asp:Literal ID="ltrlSource" runat="server" Text='<%# Eval("Source") %>'></asp:Literal></td>
        <td><asp:Literal ID="ltrlInvoice" runat="server" Text='<%# Eval("InvoiceNumber") %>'></asp:Literal></td>
        <td><asp:HyperLink ID="lnkAmazon" runat="server" NavigateUrl="www.amazon.in" Text="Amazon"></asp:HyperLink></td>
    </tr>
</ItemTemplate>
<FooterTemplate>
    </table>
</FooterTemplate>
</asp:Repeater>

Namesapce

C#

using System.Data;
using System.Configuration;
using System.Data.SqlClient;

VB.Net

Imports System.Data
Imports System.Configuration
Imports System.Data.SqlClient

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        this.Gridview();
    }
}
private void Gridview()
{
    string conString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
    using (SqlConnection con = new SqlConnection(conString))
    {
        using (SqlCommand cmd = new SqlCommand("SELECT * FROM DataSet", con))
        {
            using (SqlDataAdapter sda = new SqlDataAdapter(cmd))
            {
                DataTable dt = new DataTable();
                sda.Fill(dt);
                rptDetails.DataSource = dt;
                rptDetails.DataBind();
            }
        }
    }
}

protected void rptDetails_ItemCommand(object sender, RepeaterItemEventArgs e)
{
    if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)
    {
        RepeaterItem rptDetails = e.Item;
        Literal ltrlInvoice = ((rptDetails.FindControl("ltrlInvoice")) as Literal);
        Literal ltrlSource = ((rptDetails.FindControl("ltrlSource")) as Literal);
        if (ltrlSource.Text == "Amazon")
        {
            HyperLink lnkAmazon = (HyperLink)e.Item.FindControl("lnkAmazon") as HyperLink;
            lnkAmazon.NavigateUrl = "www.amazon.com/search=" + ltrlInvoice.Text;
            lnkAmazon.Text = "www.amazon.com";
        }

        if (ltrlSource.Text != "Amazon")
        {
            HyperLink lnkAmazon = (HyperLink)e.Item.FindControl("lnkAmazon") as HyperLink;
            lnkAmazon.NavigateUrl = "www.amazon.in/search=" + ltrlInvoice.Text;
            lnkAmazon.Text = "www.amazon.in";
        }

        if (string.IsNullOrEmpty(ltrlSource.Text) || string.IsNullOrWhiteSpace(ltrlSource.Text))
        {
            HyperLink lnkAmazon = (HyperLink)e.Item.FindControl("lnkAmazon") as HyperLink;
            lnkAmazon.Text = ltrlInvoice.Text;
        }
    }
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not Me.IsPostBack Then
        Me.Gridview()
    End If
End Sub

Private Sub Gridview()
    Dim conString As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
    Using con As SqlConnection = New SqlConnection(conString)
        Using cmd As SqlCommand = New SqlCommand("SELECT * FROM DataSet", con)
            Using sda As SqlDataAdapter = New SqlDataAdapter(cmd)
                Dim dt As DataTable = New DataTable()
                sda.Fill(dt)
                rptDetails.DataSource = dt
                rptDetails.DataBind()
            End Using
        End Using
    End Using
End Sub

Protected Sub rptDetails_ItemCommand(ByVal sender As Object, ByVal e As RepeaterItemEventArgs)
    If e.Item.ItemType = ListItemType.Item OrElse e.Item.ItemType = ListItemType.AlternatingItem Then
        Dim rptDetails As RepeaterItem = e.Item
        Dim ltrlInvoice As Literal = (TryCast((rptDetails.FindControl("ltrlInvoice")), Literal))
        Dim ltrlSource As Literal = (TryCast((rptDetails.FindControl("ltrlSource")), Literal))

        If ltrlSource.Text = "Amazon" Then
            Dim lnkAmazon As HyperLink = TryCast(CType(e.Item.FindControl("lnkAmazon"), HyperLink), HyperLink)
            lnkAmazon.NavigateUrl = "www.amazon.com/search=" & ltrlInvoice.Text
            lnkAmazon.Text = "www.amazon.com"
        End If

        If ltrlSource.Text <> "Amazon" Then
            Dim lnkAmazon As HyperLink = TryCast(CType(e.Item.FindControl("lnkAmazon"), HyperLink), HyperLink)
            lnkAmazon.NavigateUrl = "www.amazon.in/search=" & ltrlInvoice.Text
            lnkAmazon.Text = "www.amazon.in"
        End If

        If String.IsNullOrEmpty(ltrlSource.Text) OrElse String.IsNullOrWhiteSpace(ltrlSource.Text) Then
            Dim lnkAmazon As HyperLink = TryCast(CType(e.Item.FindControl("lnkAmazon"), HyperLink), HyperLink)
            lnkAmazon.Text = ltrlInvoice.Text
        End If
    End If
End Sub

Screenshot