how to select an item in a combobox in another form when combobox is binded to a table in c#

Question

I know it may be a duplicate question but previous question did not solve my problem.

I have Form1 and Form2 . In Form1 there is a dataGridView with a field called category .

In form2 I have set a combobox . I send data from field category of dataGridView in form1 to this combobox in Form2 .

I have made the identifier of this combobox public. There is an update button in Form1 .

I want when I select a row and click on update button , Form2 opens and the combobox that is there shows the value of field category of dataGridView of Form1.

This is the code:

Form2 fr2 = new Form2();  

fr2.cmbCategory.Text = dgvProduct.SelectedRows[0].Cells[1].Value.ToString(); 

fr2.Show();

Then in Form2 I have set the DataSource of cmbCategory to tblCategory , and set it's Display member to field code .

I want cmbCategory to show all items of field code in tblCategory and at the same time, one of those items be selected. And so the selected item should be the one that I pass to it from Form1 .

I wonder how can it be done? I'm new in coding and I really appreciate if you answer in a simple way. I have used visual c# to do all this.

Answer 1

You can do like this

Updated: Use Text instead of SelectedItem

In your Form1 cs file:

private void UpdateButton_Click_1(object sender, EventArgs e)
{
    int category = 0;
    Int32.TryParse(dgvProduct.SelectedRows[0].Cells[1].Value.ToString(), out category);
    Form2 fr2 = new Form2(category);  // You are calling parameterized constructor for Form2
    fr2.Show();
}

Now in your Form2 cs file:

public partial class Form2 : Form
{
    public int Category { get; set; }  // Property for selected category (You need this only if you need the category outside Form2 constructor)

    public Form2()  // Default constructor
    {
        InitializeComponent();
    }

    public Form2(int category) // Contructor with string parameter
    {
        Category = category;
        InitializeComponent();
        cmbCategory.Text = Category.ToString();  **// Use Text property instead of SelectedItem.**
    }
}