How to Add Combobox to DataGridView in C#

C# DataGridView

In C#, the DataGridView is a powerful control used to display data in a tabular format. It's a part of the Windows Forms library (System.Windows.Forms) and can be used for editing, displaying, and formatting data in rows and columns.

The DataGridView is highly customizable and supports a wide range of operations such as sorting, filtering, and complex data binding.

How to work with a DataGridView in a C# Windows Forms application

Open Visual Studio, then click New Project, then select Visual C# on the left, then Windows and then select Windows Forms Application. Name your project "ComboboxDataGridView" and then click OK

Next, Drag and drop a DataGridView control from the Visual Toolbox onto your form designer.

Create an Entity Framework Model First, then add Category and Product table to your EF Model

You will bind data from your Entity Framework model to both the DataGridView and the ComboBox column.

In the code-behind file of your Form1, you need to set up the DataGridView and ComboBox column programmatically.

private void Form1_Load(object sender, EventArgs e)
{
    //Get category, product data from the Northwind database
    using (NorthwindEntities db = new NorthwindEntities())
    {
        productBindingSource.DataSource = db.Products.ToList();
        categoryBindingSource.DataSource = db.Categories.ToList();
    }
}

In the example, a list of Product objects is created, and the DataGridView is bound to this list via DataSource. The Product class defines the properties that correspond to the columns of the DataGridView.

In the designer, you can add a DataGridView and set its properties, or you can initialize it programmatically as shown above.

Make sure you have your Entity Framework model created using Database First approach. Assume you have a DbContext called NorthwindEntities and two entities: Product and Category.

By following these steps, you set up a DataGridView with a ComboBox column that is bound to a list of categories from your Entity Framework model.

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