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06.30.2008 at 07:43PM PDT, ID: 23528984
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9.2

Conditional show/hide a hyperlink in Gridview

Asked by pbissegger in Programming for ASP.NET, Microsoft Visual Basic.Net

Tags: , , ,

Hi,

I am trying to display a gridview of different people, including their name, their telephone number, and their email.

If they do have an email address, I want to display the text "Email", and have a hyperlink which has a "mailto:" and then the email address (for example: mailto:peter@experts-exchange.com)

If they do not have an email, I want to display a blank cell (where they cannot see or click on anything).

Please find attached the code - I am having problems finding the right syntax for the Rowdatabound subroutine.

Thanks, PeterStart Free Trial 
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Sub Page_Load(ByVal Source As Object, ByVal E As EventArgs)
MySQL = "SELECT Firstname, Lastname, Usernum, Groupnum, Hometel, Email from contacts Order By Lastname"        
Dim Contactstable As New SqlDataAdapter(MySQL, MyConn)
        Contactstable.Fill(ds, "players")
        GridView1.DataSource = ds.Tables("players").DefaultView
        GridView1.DataBind()
    End Sub
 
    Protected Sub GridView1_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound            
        If e.Row.RowType = DataControlRowType.DataRow Then
            If e.Row.Cells(4).Text = "" Then
                 e.Row.Cells(4).Label.Visible = "false"             
            else
                 e.Row.Cells(4).Label.Visible = "true"
                 e.Row.Cells(4).NavigateURL = "mailto:" & e.Row.Cells(4).Text
            End If
        End If
    End Sub
 
 
    <asp:GridView ID="GridView1" runat="server" Width="550px" CellPadding="3" Font-Size="10pt"
    HeaderStyle-BackColor="#bbccdd" HeaderStyle-Font-Bold="true" AutoGenerateColumns="false"
    EnableViewState="false" AllowSorting="true" AllowPaging="false">
    <Columns>
        <asp:Boundfield DataField="Firstname" />
        <asp:Boundfield DataField="Lastname" />
        <asp:Boundfield DataField="Varyfield" />
        <asp:Boundfield DataField="Hometel" />  
        <asp:Templatefield>
            <ItemTemplate>
                <asp:HyperLink ID="Email" runat="server" NavigateUrl='<%# "mailto:" & Container.DataItem("Email") %>' />
            </ItemTemplate>
        </asp:Templatefield>
    </Columns>
    
    </asp:GridView>
[+][-]07.01.2008 at 12:52AM PDT, ID: 21905616

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About this solution

Zones: Programming for ASP.NET, Microsoft Visual Basic.Net
Tags: Microsoft, VB.NET, VB.NET, IE6+
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Solution Provided By: carlnorrbom
Participating Experts: 2
Solution Grade: B
 
 
[+][-]07.01.2008 at 12:56AM PDT, ID: 21905636

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[+][-]07.01.2008 at 06:11AM PDT, ID: 21907412

Often, when Experts are collaborating with members who have asked questions, they will request additional information about the problem. Askers respond with an author comment like this one.

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