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c#winformsdatagridviewuser-controls
Vipin Jacob
Vipin Jacob

Reputation: 47

Usercontrol data gridview not loading with data

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; }
        }
    }
}

Upvotes: 2

Views: 1834

Answers (2)

DevSL93
DevSL93

Reputation: 1

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

  1. Go to the userControl.cs

  2. paste below code in the constructor

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

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

Upvotes: 0

Mong Zhu
Mong Zhu

Reputation: 23732

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

Upvotes: 3

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