private void FormFieldsMap_Load(object sender, EventArgs e) { DataGridViewComboBoxColumn inputFieldColumn = new DataGridViewComboBoxColumn(); inputFieldColumn.Name = "inputField"; //Set selection range to input fields dataGridViewFieldsMap.Columns.Remove("inputField"); foreach (KeyValuePair <string, int> fieldDef in inputFields) { inputFieldColumn.Items.Add(fieldDef.Key); } dataGridViewFieldsMap.Columns.Add(inputFieldColumn); map.AutoMap(); setMapping(); }