Takie rzeczy robi się w zdarzeniu RowDataBound.
Zakładamy, że mamy taką klasę:
namespace WebApplication2
{
public class Student
{
public string Imie { get; set; }
public string Nazwisko { get; set; }
}
}
Taki formularz:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication2.Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
onrowdatabound="GridView1_RowDataBound">
<Columns>
<asp:BoundField DataField="Imie" />
<asp:BoundField DataField="Nazwisko" />
<asp:ButtonField Text="Button" />
</Columns>
</asp:GridView>
</div>
</form>
</body>
</html>
I taki code behind:
using System;
using System.Collections.Generic;
using System.Web.UI.WebControls;
namespace WebApplication2
{
public partial class Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
List<Student> studenty = new List<Student>()
{
new Student() { Imie="Ala", Nazwisko="Srala", },
new Student() { Imie="Grzegorz", Nazwisko="Brzęczyszczykiewicz", },
new Student() { Imie="Jaś", Nazwisko="Fasola", },
new Student() { Imie="Adam", Nazwisko="Sienkiewicz", },
};
this.GridView1.DataSource = studenty;
this.GridView1.DataBind();
}
protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
{
if (e.Row.RowType == DataControlRowType.DataRow)
{
e.Row.Cells[2].Visible = CzyPrzycisk((Student)e.Row.DataItem);
}
}
protected bool CzyPrzycisk(Student s)
{
return (s.Imie + s.Nazwisko).Length > 10;
}
}
}