Usercontrol data gridview not loading with data

Question

I am creating a custom usercontrol with a DataGridView and I am adding this usercontrol to my form. In the Form1_Load event I am initialising the user control by invoking the constructor of the user control. Its a parameterized constructor which has a List as argument and the list is being used as the DataSource for the DataGridView in the user control.

The problem is: the DataGridView is not loaded with the data.

can any one figure it out.

the code in the form load event is,

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

namespace usercontrol
{
    public partial class Form1 : Form
    {
         public Form1()
         {
            InitializeComponent();
         }

         private void Form1_Load(object sender, EventArgs e)
         {
             List<Car> cars = new List<Car>();
             cars.Add(new Car("Ford", "Mustang", "1967"));
             cars.Add(new Car("Shelby AC", "Cobra", "1965"));
             cars.Add(new Car("Chevrolet", "Corvette Sting Ray", "1965"));                 

             ucSample uc = new ucSample(cars);
         }            
    }

    public class Car
    {
        private string company;
        private string color;
        private string year;
        public Car(string com,string col,string yea)
        {
            this.Company = com;
            this.Color = col;
            this.Year = yea;
        }

        public string Company { get; set; }
        public string Color { get; set; }
        public string Year { get; set; }   
    }       
}

The code in the user control is

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

namespace usercontrol
{
    public partial class ucSample : UserControl
    {
        public ucSample()
        {
            InitializeComponent();
        }

        public ucSample(List<Car> listString)
        {
            InitializeComponent();
            DataSource = listString;
        }

        public object DataSource
        {
            get { return dgvSample.DataSource; }
            set { dgvSample.DataSource = value; }
        }
    }
}

Does the `DataGridView` have the property `AutoGenerateColumns` set to `true`? — Equalsk, Dec 21 '16 at 14:45

score 3 · Accepted Answer · edited May 23 '17 at 12:33

3

Your problem is that you create a custom control in an extra class but never add the control to your form to be displayed

A simple line will solve your problem:

this.Controls.Add(uc);

Put it in the constructor. That will ensure that your custom control is added to the Form for display

EDIT:

there is of course also a manual way: Here is an answer with screenshots How do I add my new User Control to the Toolbox or a new Winform?

Here is another one : add user control to a form

edited May 23 '17 at 12:33

Community

1
1

answered Dec 21 '16 at 14:54

Mong Zhu

23,309
10
44
76

Thank you. I thought while dragging from toolbox and droppng to the form, it will be added to the form. So whenever I want to use a custom user control I have to use the same method or is there any other way to do this – Vipin Jacob Dec 21 '16 at 15:02
@VipinJacob I put 2 links that show how to do it otherwise, check my edit – Mong Zhu Dec 21 '16 at 15:08

score 0 · Answer 2 · edited Jun 20 '20 at 09:12

0

datagridview is in user control. that's why your Datagrid not loading with the user control in the Form.

Go to the userControl.cs
paste below code in the constructor

"this.studentTableAdapter.Fill(this.universityDataSet.Student);"

In my case, the dataset is universityDataSet and the table is Student

edited Jun 20 '20 at 09:12

Community

1
1

answered Nov 28 '19 at 17:38

DevSL93

1

Usercontrol data gridview not loading with data

2 Answers2