index > Windows Forms General > datagridview refreshing problem

datagridview refreshing problem

Look i made a class TaskBar

class TaskBar{

}

it has some set of properties

then in a winfdow form i made a datagridview as db1;

there i made a list of type TaskBar;

List<TaskBar> m_Tasks = new m_Tasks<TaskBar>();

then i have a function which is called a a button click event there i wrote this code

here i insert some data in the m_Tasks List ;

db1.DataSource = m_Tasks;
db1.AutoGenerateColumns = true;
db1.Invalidate();

now tell me why the ____ the data grid is not getting populated by the data. tell me what should i do.

connect2vishal Thursday, April 16, 2009 1:14 PM

Form dynamic list that should update the databindings you can better use BindingList<T> instead of List<T>.

BindingList<T> will trigger updates when you add items to this list.

Marked As Answer byLinda LiuMSFT, ModeratorTuesday, April 21, 2009 6:10 AM

boothwine Thursday, April 16, 2009 2:20 PM

One point: you should not add items from another thread. Add only items from UI thread else the DataGridView will have issues...

Marked As Answer byLinda LiuMSFT, ModeratorTuesday, April 21, 2009 6:10 AM

boothwine Thursday, April 16, 2009 2:31 PM

public class stud
        {
            public string name { get; set; }
        }


private void Form1_Load(object sender, EventArgs e)
        {
         
            List<stud> s = new List<stud>();

            stud ss = new stud();
            ss.name = "a";
            s.Add(ss);

            ss = new stud();
            ss.name = "b";
            s.Add(ss);

            dataGridView1.DataSource = s;
            dataGridView1.AutoGenerateColumns = true;
        }


/// Tried the above code; its working perfect

Thanks, A.m.a.L | [Remember to click "mark as answered" when you get a correct reply to your question]

A.m.a.L - aditi.com - Think Product Thursday, April 16, 2009 1:22 PM

but in my case i got some success but not as whole
gimme ur email id i send u the code
plz..........

i need serious help... assap

connect2vishal Thursday, April 16, 2009 1:47 PM

actually in my case when i try to add somthing more dynamically it doesnt show the effect..........
means row count is not increasing.................. :(

connect2vishal Thursday, April 16, 2009 1:49 PM

Error1'NewsReaderLook.Form3.stud.name.get' must declare a body because it is not marked abstract or externF:\GanttChartResearch\117 march 2009\treegridview\TreeGridView Test App\Form3.cs4834News Reader Look

this is what i am getting

connect2vishal Thursday, April 16, 2009 1:56 PM

Are you using dataGridView or TreeGridView?

Is this TreeGridView this one

If so than you can't use data bindings. (these are probably not aware of nodes and sub-nodes)

boothwine Thursday, April 16, 2009 2:05 PM

no right now this is data grid view............

please check my code plz.............. thanx.......

connect2vishal Thursday, April 16, 2009 2:12 PM

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace NewsReaderLook
{
public partial class Form3 : Form
{
List<stud> s;
public stud ss;
public Form3()
{
InitializeComponent();
}

private void Form3_Load(object sender, EventArgs e)
{
s = new List<stud>();

ss = new stud();
ss.Name = "a";
s.Add(ss);

ss = new stud();
ss.Name = "b";
s.Add(ss);

dataGridView1.DataSource = s;
dataGridView1.AutoGenerateColumns = true;

}

private void button1_Click(object sender, EventArgs e)
{
ss = new stud();
ss.Name = "c";
s.Add(ss);

dataGridView1.Invalidate();
}

public class stud
{
public string name = "";
public string Name { get {
return name;
} set {
name = value;
} }
}

}
}

connect2vishal Thursday, April 16, 2009 2:13 PM

Form dynamic list that should update the databindings you can better use BindingList<T> instead of List<T>.

BindingList<T> will trigger updates when you add items to this list.