c＃在DataGridView中使用ComboBox修改Mysql中的單元格

Question

我是新手，我需要詳細的答復，對不起我的英語不好。。。我會盡力向自己解釋一下。.我在Mysql中有2個表

 table1:  id_ticket , ticket_description, ticket_status(id_status)         
 table2 :    id_statu , status_name

在我的應用程序中，我使用table1內的所有信息來填充DataGridView，還添加了一個comboBox列，組合框顯示table2中的“ status_name”，我想使用comboBox中包含的信息來修改ticket_status，我該怎么辦那？

這是我的代碼：

public void CreateAssignedToMe(string ConnString)
    {
        string assignedTo = textBoxUid.Text;
        string query = "SELECT * FROM reports WHERE ticket_assignee='"+assignedTo+"' AND ticket_resolution < 3;";

        AssignToMe = new AssignedToMe();
        AssignToMe.ConnString = ConnString;
        DataGridView dgvReports = AssignToMe.dataGridViewAssignedToMe;

        try
        {
            MySqlConnection conn = new MySqlConnection(ConnString);
            conn.Open();
            MySqlDataAdapter daUsers = new MySqlDataAdapter(query,ConnString);
            DataSet dsUsers = new DataSet();
            daUsers.Fill(dsUsers,"report");
            dgvReports.DataSource = dsUsers;
            dgvReports.DataMember = "report";
            dgvReports.AllowUserToAddRows = false;
            dgvReports.AllowUserToDeleteRows = false;
            dgvReports.Columns["ticket_departmentResponsive"].Visible = false;
            dgvReports.Columns["ticket_assignee"].Visible = false;


                string queryStatus = "SELECT * FROM status";
                MySqlDataAdapter daStatus = new MySqlDataAdapter(queryStatus, ConnString);                  
                DataSet dsStatus = new DataSet();
                MySqlCommandBuilder builder = new MySqlCommandBuilder(daStatus);
                daStatus.Fill(dsStatus, "Resolution");

                daStatus.UpdateCommand = builder.GetUpdateCommand();

                DataGridViewComboBoxColumn cbbox = new DataGridViewComboBoxColumn();
                BindingSource StatusBindingSource = new BindingSource();
                StatusBindingSource.DataSource = dsStatus;
                StatusBindingSource.DataMember = "Resolution";
                cbbox.HeaderText = "Resolution";
                cbbox.DropDownWidth = 90;
                cbbox.DataSource = StatusBindingSource;
                cbbox.DisplayMember = "status_name";
                dgvReports.Columns.Add(cbbox);



            AssignToMe.ShowDialog();

        }
        catch(MySqlException ex)
        {
            MessageBox.Show(ex.Message.ToString());
        }

}

我無法發布圖片:(

Answer 1

您必須添加DataGridView.CellValueChanged Event 。 更改任何單元格值時，將執行分配給該事件的功能。

// adding event handler (somewhere after dgvReports initialization)
dgvReports.CellValueChanged += new DataGridViewCellEventHandler(dgvReports_CellValueChanged);

// function that handles event
private void dgvReports_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
    // `e` argument will contain e.RowIndex and e.ColumnIndex properties
    // they may be used to determine which particular cell was changed

}

在事件處理程序中，您應該檢查更改了哪些列/單元格（行和單元格索引應通過DataGridViewCellEventArgs e參數傳遞給處理CellValueChanged事件的方法）。

檢查之后-您應該“進行更新”。