DataTable 中的值變成 gridview 為 combobox

Question

我試圖從我的數據表中獲取一列以在我的網格視圖中顯示為組合框。 還需要有能力用一個小集合來填充組合以供選擇。 當我從 Gui 綁定它時它不會顯示值，所以我正在嘗試編程但似乎找不到正確的代碼。

 connection2 = new MySqlConnection(ConnectionString2);


        try
        {
            string proid = txtbxProjId.Text;

            //prepare query to get all records from items table
            string query2 = "select sl.sample_id As sample_id, sl.sample_number As Sample_Number, sl.sample_date As Sample_Date, sl.sample_time As Sample_Time, sl.sample_comments As Sample_Comments FROM spt_sample_login sl Where project_id = '"+proid+"'";



            //prepare adapter to run query
            adapter2 = new MySqlDataAdapter(query2, connection2);
            adapter3 = new MySqlDataAdapter(query2, connection2);

            //create a DataTable to hold the query results
            DataTable dTable2 = new DataTable();
            DataSet DS2 = new DataSet();

            //fill the DataTable


            //get query results in dataset
            adapter2.Fill(dTable2);
            adapter3.Fill(DS2);



            //return datatable with all records
            //BindingSource to sync DataTable and DataGridView


                //set the BindingSource DataSource
            GridView1.DataSource = dTable2;


            this.GridView1.Columns["sample_id"].Visible = false;

            this.GridView1.Columns["Sample_Type"].DisplayIndex = 4;
           this.GridView1.Columns["Sample_Type"].Visible = true;










            //set the DataGridView DataSource












        }
        catch (MySqlException ex)
        {


        }
    }

這有效，但將 Sample_Type 顯示為文本框，我希望它與 F、PQ、B 作為選項組合。

謝謝布倫特

Answer 1

您必須將 ComboBox 放入 itemTemplate 中，並且必須在 rowDataBound 事件期間填充它。

我當前項目的快速示例：

DropDownList ddlRole = (DropDownList)e.Row.FindControl("ddlRole");

ddlRole.DataSource = GetTruckersRoles();

string[] rolesList = Roles.GetRolesForUser((string)gvTruckers.DataKeys[e.Row.RowIndex][0]);
if (rolesList.Length > 0)
{
    //If user is not in any roles, dont' do this
    ddlRole.SelectedValue = rolesList[0];
}

ddlRole.DataBind();

只需根據您的情況調整代碼