DataGridView set column cell Combobox

Try this

dataGridView1.AutoGenerateColumns = false;

DataTable dt = new DataTable();
dt.Columns.Add("Name", typeof(String));
dt.Columns.Add("Money", typeof(String));
dt.Rows.Add(new object[] { "Hi", 100 });
dt.Rows.Add(new object[] { "Ki", 30 });

DataGridViewComboBoxColumn money = new DataGridViewComboBoxColumn();
var list11 = new List<string>() { "10", "30", "80", "100" };
money.DataSource = list11;
money.HeaderText = "Money";
money.DataPropertyName = "Money";

DataGridViewTextBoxColumn name = new DataGridViewTextBoxColumn();
name.HeaderText = "Name";
name.DataPropertyName = "Name";

dataGridView1.DataSource = dt;
dataGridView1.Columns.AddRange(name, money);

Just use DataPropertyName instead of ValueMember

You could try the following:

DataGridViewComboBoxColumn column = new DataGridViewComboBoxColumn();
column.Name = "Money";
column.DataSource = new string[] { "10", "30", "80", "100" };
dataGridView1.Columns.Add(column);

for (int row = 0; row < dataGridView1.Columns.Count; row++)
{
   DataGridViewComboBoxCell cell = 
       (DataGridViewComboBoxCell)(dataGridView1.Rows[row].Cells["Money"]);
   cell.DataSource = new string[] { "80", "100" };
}

Or this:

foreach (DataGridViewRow row in dataGridView1.Rows)
{
    DataGridViewComboBoxCell cell = (DataGridViewComboBoxCell)(row.Cells["Money"]);
    cell.DataSource = new string[] { "10", "30" };
}

You were almost done.

There are only two minor issues:

1. In your table you are adding to rows "Money" value as integers, while in your column they are defined as string
2. First add your table ad DataGridView DataSource, and then set column DataPropertyName

Full code below:

var table = new DataTable();
table.Columns.Add("Name", typeof(string));
table.Columns.Add("Money", typeof(string));
table.Rows.Add("Hi", "100");
table.Rows.Add("Ki", "30");

var column = new DataGridViewComboBoxColumn();
column.DataSource = new List<string>() { "10", "30", "80", "100" };            

dataGridView1.Columns.Add(column);
dataGridView1.DataSource = table;