Question

一旦我更新了表格行并关闭了表格，我就会因刷新dataGridView而感到困惑和困惑。

我有2个表格。 MainForm和EditAdminForm。主窗体包含dataGridView，其中列出了Admin表。 EditAdminForm由来自dataGridView的选定数据行填充。一旦更新，我关闭表格，但桌子不新鲜。

我尝试过一个简单的dataGridView.Refresh();，但这不起作用。

MainForm

private void EditAdminBtn_Click(object sender, EventArgs e)
{

    EditAdminForm Admin = new EditAdminForm();

    Admin.idTxt.Text = this.dataGridView1.CurrentRow.Cells[0].Value.ToString();
    Admin.usernameTxt.Text = this.dataGridView1.CurrentRow.Cells[1].Value.ToString();
    Admin.firstnameTxt.Text = this.dataGridView1.CurrentRow.Cells[2].Value.ToString();
    Admin.surnameTxt.Text = this.dataGridView1.CurrentRow.Cells[3].Value.ToString();
    Admin.emailTxt.Text = this.dataGridView1.CurrentRow.Cells[4].Value.ToString();
    Admin.statusCombo.Text = this.dataGridView1.CurrentRow.Cells[6].Value.ToString();

    Admin.ShowDialog();

}

EditAdminForm

private void SaveBtn_Click(object sender, EventArgs e)
        {
            //SQL Connection and SQL for updating admin information
            SqlConnection con = new SqlConnection(@"Data Source=(LocalDB)\v11.0; AttachDbFilename=C:\Users\Donald\Documents\Visual Studio 2013\Projects\DesktopApplication\DesktopApplication\Student_CB.mdf ;Integrated Security=True");
            SqlDataAdapter sda3 = new SqlDataAdapter("UPDATE Admin set Admin_Username='" + this.usernameTxt.Text + "' , Admin_FName='" + this.firstnameTxt.Text + "' , Admin_SName='" + this.surnameTxt.Text + "' , Admin_Email='" + this.emailTxt.Text + "', Admin_Status='" + this.statusCombo.Text + "' WHERE Admin_ID='" + this.idTxt.Text + "'", con);
            DataTable dt3 = new DataTable();
            sda3.Fill(dt3);
            MessageBox.Show("Information Successfully Updated!");
            dt3.Clear();

            this.Close();

        }

加载表格数据

public void MainForm_Load(object sender, EventArgs e)
        {
            // TODO: This line of code loads data into the 'student_CBDataSetStudent.Student' table. You can move, or remove it, as needed.
            this.studentTableAdapter.Fill(this.student_CBDataSetStudent.Student);
            // TODO: This line of code loads data into the 'student_CBDataSetAdmin.Admin' table. You can move, or remove it, as needed.
            this.adminTableAdapter.Fill(this.student_CBDataSetAdmin.Admin);

        }

Answer 1

在您的编辑管理员表格中，您可以编辑＆＃34;数据库＆＃34;中的内容，而不是在您的表格中。这意味着你必须在完成后重新加载表格。

将处理程序附加到＆＃34;已关闭＆＃34;主表单中的事件以及刷新说明。这将在表单关闭时自动触发更新：

    private void EditAdminBtn_Click(object sender, EventArgs e)
    {

        EditAdminForm Admin = new EditAdminForm();
        Admin.Closed += delegate(object sender, EventArgs e){
           this.studentTableAdapter.Fill(this.student_CBDataSetStudent.Student);
           this.adminTableAdapter.Fill(this.student_CBDataSetAdmin.Admin);
        };
        Admin.idTxt.Text = this.dataGridView1.CurrentRow.Cells[0].Value.ToString();
        Admin.usernameTxt.Text = this.dataGridView1.CurrentRow.Cells[1].Value.ToString();
        Admin.firstnameTxt.Text = this.dataGridView1.CurrentRow.Cells[2].Value.ToString();
        Admin.surnameTxt.Text = this.dataGridView1.CurrentRow.Cells[3].Value.ToString();
        Admin.emailTxt.Text = this.dataGridView1.CurrentRow.Cells[4].Value.ToString();
        Admin.statusCombo.Text = this.dataGridView1.CurrentRow.Cells[6].Value.ToString();

        Admin.ShowDialog();

    }

Answer 2

有很多方法可以做到这一点，包括在EditAdminForm上使用数据绑定，但最简单的方法可能就是更新SaveBtn_Click方法中的行。从技术上讲，重新查询和重新填充DataGridView更准确，尽管并非总是必要的。如果更新成功，那么您可以直接通过在打开EditAdminForm时存储行来更新行中的数据：

private void EditAdminBtn_Click(object sender, EventArgs e)
{
    var admin = new EditAdminForm();
    admin.CurrentRow = dataGridView1.CurrentRow;
    admin.ShowDialog();
}

// EditAdminForm
private DataGridRow _currentRow;
public DataGridRow CurrentRow
{
    get { return _currentRow; }
    set
    {
        _currentRow = value;
        if (value == null)
        {
            // TODO: Clear form
        }
        else
        {
            usernameTxt.Text = value.CurrentRow.Cells[1].Value.ToString();
            firstnameTxt.Text = value.CurrentRow.Cells[2].Value.ToString();
            surnameTxt.Text = value.CurrentRow.Cells[3].Value.ToString();
            emailTxt.Text = value.Cells[4].Value.ToString();
            statusCombo.Text = value.Cells[6].Value.ToString();
        }
    }
}

private void UpdateCurrentRow()
{
    if (_currentRow == null) return;
    _currentRow.Cells[0].Value = idTxt.Text;
    _currentRow.Cells[1].Value = usernameTxt.Text;
    _currentRow.Cells[2].Value = firstnameTxt.Text;
    _currentRow.Cells[3].Value = surnameTxt.Text;
    _currentRow.Cells[4].Value = emailTxt.Text;
    _currentRow.Cells[6].Value = statusCombo.Text;
}

private void SaveBtn_Click(object sender, EventArgs e)
{
    // Save connection, same as before...
    // then update the row
    UpdateCurrentRow();
    this.Close();
}

关闭打开的表单

2 个答案: