Explanation:

BorderColor="Silver" HorizontalAlign="Center" RepeatDirection="Horizontal">

 

UserProfile.aspx is our Distanation Page where user will go to view the "Clicked user Profile". Where as "PicHandler.ashx" is our Picture Handler which server us to bring the picture from our DataBase. For more detailes how to save and retrive Pictures to DataBase see Saving and Retrieving Images From SQL Server Using ADO.NET 2.0 and to Display images in a gridview see Displaying an Image in a Gridview .

Ok, now we have basic of how to display a picture in a "DataList".  Now, will put four more controles on the Page.

1. TextBox called "TextBoxSearch" . It will be use for keywords input.
2. Button called "Buttonsearch" with Onclick event "ButtonSearch_Click".
3. Label called "LabelNoResult" whose Fore Color is set to "crimson".
4. A "RequiredFieldValidator" with Controle to validate "TextBoxSearch"

Now, Our page is ready. what we are going to do next is to bind the above DataList with a DatTable. This DataTable is return by our Function like this;

public DataTable SearchedUsersDataTable(string keyTosearch)
{
DataTable dt = new DataTable("Users");
dt.Columns.Add("Name", typeof(string));

MembershipUserCollection memUserCol = Membership.GetAllUsers();
ProfileCommon prof;
string searchKey = keyTosearch.ToLower();
foreach (MembershipUser Tuser in memUserCol)
{
   prof = Profile.GetProfile(Tuser.UserName);

    if (Tuser.UserName.ToLower().Contains(searchKey))
    {
      dt.Rows.Add(new Object[] { Tuser.UserName });
    }
   else if (prof.FirstName.ToLower().Contains(searchKey))
   {
      dt.Rows.Add(new Object[] { Tuser.UserName });
    }
    else if (prof.LastName.ToLower().Contains(searchKey))
    {
      dt.Rows.Add(new Object[] { Tuser.UserName });
    }
}
return dt;
}

protected void ButtonSearch_Click(object sender, EventArgs e)
{  
  UserDataList.DataSource = SearchedUsersDataTable(TextBoxSearch.Text);
  UserDataList.DataBind();
}

We are binding our DataList with pulled DataTable.
Now, what about if some one is trying to search some"keywords" which return no "DataRow"? Just add the following code to the "Buttonsearched_Click" Event just after the DataList Binding. Now the code will look like this;

protected void ButtonSearch_Click(object sender, EventArgs e)
{  
    UserDataList.DataSource = SearchedUsersDataTable(TextBoxSearch.Text);
    UserDataList.DataBind();
if (UserDataList.Items.Count == 0)
{
     LabelNoResult.Visible = true;
     LabelNoResult.Text = "No User Found for your search key!";
}
else
     LabelNoResult.Visible = false;
}

Hope it help.