custom hyperlink for member info pages.

**avianrr** · 02-09-2007 01:48 PM

Ok, I originally posted this in the databases section thinking it was more of a data access issue. Now however I've rethunk the problem and clarified it a bit. So I'll post it here (probably more appropriate) and hope for a better response. I have a gridview that I've created a custom template for. In that template I have a place where I need a hyperlink to go to the contact information page of the user associated with a piece of information. My problem is two-fold. The database stores the refference in the table as 'UserID uniqueidentifier'. Currently it's showing the hyperlink as follows. <asp:HyperLink ID="HyperLink1" runat="server" Text='<%# Eval("UserID") %>' NavigateUrl="~/UserInfo.aspx?UsrID=0"></asp:HyperLink> I need the Text value to equal the username. For wich I wrote the following function. public string GetMemberName(string UsrID) { if (UsrID != null) { System.Guid mUID = new System.Guid(UsrID); if (mUID != null) { MembershipUser mUsr = Membership.GetUser(mUID); return mUsr.UserName; } } return null; } But I have no idea how to call the function from the hyperlink. The other problem is that the UsrID= is currently hard coded to 0 because I can't find a way to get the <%# Eval("UserID") %> databinding to work in the middle of a string. If anyone has any suggestions on how to get this working please let me know. My current working theroy, Custom controls. I'm trying to find a decent refference on how to create a custom control that would serve my purpose but so far I'm not even sure how to create custom controls. Any help on how to use the asp:hyperlink control the way I need and/or any help on how to create a custom control that would do what I need would be appreciated. Thanks, Rob

**the_origional_Andrew** · 02-09-2007 02:06 PM

Give or a take a typo, it can be done like this: <asp:HyperLink ID="HyperLink1" runat="server" Text='<%# GetMemberName((string)DataBinder.Eval("UserID")) %>' NavigateUrl='<%#DataBinder.Eval(Containe r.DataItem,"UserID","~/UserInfo.aspx?UsrID=0" %>'></asp:HyperLink>

**the_origional_Andrew** · 02-09-2007 02:07 PM

gotta use a format string with a placeholder {} "~/UserInfo.aspx?UsrID={0}"

**avianrr** · 02-09-2007 03:06 PM

I'm having trouble getting that to work. is it in VB or c#? I probably should have mentioned that I'm useing c# so my VB is kinda not so good.

**the_origional_Andrew** · 02-09-2007 03:12 PM

It almost doesn't matter which language, but the cast expression makes it C# GetMemberName((string)DataBinder.Eval("UserID"))

**the_origional_Andrew** · 02-09-2007 03:14 PM

Bah, so simple, yet I keep forgetting bits GetMemberName((string)DataBinder.Eval(Container.DataItem"UserID"))

**avianrr** · 02-09-2007 03:39 PM

Thanks for the reply. I got it working. A little different than what you had but. The problem truned out to be in the Navigation URL part. I did it like this. <asp:HyperLink ID="HyperLink1" runat="server" Text='<%# GetMemberName((System.Guid) Eval("UserID")) %>' NavigateUrl='<%# String.Format("~/UserInfo.aspx?UsrID={0}",Eval("UserID")) %>'></asp:HyperLink> It also complained about the String to System.Guid cast and I realized my function was just casting it back right away so I did this. public string GetMemberName(string UsrID) { if (UsrID != null && UsrID != string.Empty) { System.Guid mUID = new System.Guid(UsrID); if (mUID != null) { MembershipUser mUsr = Membership.GetUser(mUID); return mUsr.UserName; } } return null; } public string GetMemberName(System.Guid mUID) { MembershipUser mUsr = Membership.GetUser(mUID); return mUsr.UserName; } Now if it returns a string or System.Guid it'll be happy! :) I also got the idea of a custom control to work. Here's the code. UserInfoHyperlink.ascx <%@ Control Language="C#" AutoEventWireup="true" CodeFile="UserInfoHyperlink.ascx.cs" Inherits="UserInfoHyperlink" %> <asp:HyperLink ID="UIHyperLink1" runat="server" Text="UserInfo"></asp:HyperLink> UserInfoHyperlink.ascx. cs using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.ComponentModel; using System.Security.Permissions; [ AspNetHostingPermission(SecurityAction.Deman d, Level = AspNetHostingPermissionLevel.Minimal), AspNetHo stingPermission(SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal), DefaultP roperty("UsrID"), ToolboxData("<{0}:UserIn foHyperlink runat=\"server\" UsrID=\"0\"> </{0}:Book>") ] public partial class UserInfoHyperlink : System.Web.UI.UserControl { private string UID; protected void Page_Load(object sender, EventArgs e) { } [ Bindable(true), Category("Appearance"), DefaultValue(""), Description("The UserID of the user to get the info for."), Localizable(true) ] public string UsrID { get { return (UID == null)?string.Empty:UID; } set { UID = value; UIHyperLink1.Text = GetMemberName(UID); UIHyperLink1.NavigateUrl = "~/UserInfo.aspx?UsrID=" + UID; } } private string GetMemberName(string UsrID) { if (UsrID != null && UsrID != string.Empty) { System.Guid mUID = new System.Guid(UsrID); if (mUID != null) { MembershipUser mUsr = Membership.GetUser(mUID); return mUsr.UserName; } } return null; } } and it gets used like this. <uc1:UserInfoHyperlink id="UserInfoHyperlink1" runat="server" UsrID='<%# Eval("UserID") %>'></uc1:UserInfoHyperlink> Just incase anyone else wanted to see. It's good to know more than one way to do something cause you never know when the techneque might come in handy. Thank you "the_original_andrew" I've learned alot from this one.

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got it working.

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