Winform C＃更新DataTable单元上的DataGridView值已更改

Question

I have DataGridView and DataTable, DataTable is assigned as a datasource in DataGridView.

When I change some value in DataTable it is not update on the view.

So How can i achive this

I have tried following things

1. BindingSource
2. Refresh()

Demo Code

DataGridView datagrid = new DataGridView();
DataTable dt = new DataTable();

dt.Columns.Add("No");
dt.Columns.Add("Name");

for (int i = 1; i <= 10; i++)
{
     DataRow row = dt.NewRow();
     row[0] = i;
     row[1] = "ABC";
     dt.Rows.Add(row);
}

datagrid.DataSource = dt;

Here my above code

When i change some value in DataTable it is not reflect in DataGridView

dt.Rows[0][1] = "XYZ";

So Please help me....

Answer 1

I am able to do this, which works:

private DataTable _dt = new DataTable();  

private void Form1_Load(object sender, EventArgs e)
{

    _dt.Columns.Add("LongText");
    DataRow dr = _dt.NewRow();
    dr[0] = "One";
    _dt.Rows.Add(dr);
    dr = _dt.NewRow();
    dr[0] = "Two";
    _dt.Rows.Add(dr);
    dr = _dt.NewRow();
    dr[0] = "Three";
    _dt.Rows.Add(dr);
    dataGridView1.DataSource = _dt;
}

private void button1_Click(object sender, EventArgs e)
{
    _dt.Rows[0][0] = "daddy";
}

Answer 2

You need to add your datagrid to your form, like this:

    private void Form1_Load(object sender, EventArgs e)
    {
        DataGridView datagrid = new DataGridView();

        DataTable dt = new DataTable();

        //add this line
        Controls.Add(datagrid);

        dt.Columns.Add("No");
        dt.Columns.Add("Name");

        for (int i = 1; i <= 10; i++)
        {
            DataRow row = dt.NewRow();
            row[0] = i;
            row[1] = "ABC";
            dt.Rows.Add(row);
        }

        datagrid.DataSource = dt;

        dt.Rows[0][1] = "XYZ";
    }

Result: