Question

我有一个datagridview，如下所示。在CellEndEdit事件中，它更新MySql数据库中的表 - 但是只有当您单击另一个单元格时，才会触发输入，制表符，向下箭头等。

DataAdapter da = new DataAdapter();
DataGridView dg = new DataGridView();
BindingSource bs = new BindingSource();
DataTable dt = new DataTable();

private void fillDataGrid()
{
     da.SelectCommand = new MySqlCommand("SELECT * FROM Table WHERE idBlah = @id;", mySqlCon);
     da.Fill(dt);
     bs.DataSource = dt;
     dg.DataSource = bs;
     MySqlCommandBuilder cmb = new MySqlCOmmandBuilder(da);
}
void da_CellEndEdit(object sender, System.Windows.Forms.DataGridViewCellEventArgs e)
{
     da.Update((DataTable)bs.DataSource);
}

我在自定义datagridview类中覆盖了以下方法，以尝试跳过被触发的内容。

 protected override bool ProcessDialogKey(Keys keyData)
    {
        if (keyData == Keys.Enter)
        {
            this.EndEdit();
            return true;
        }
        return base.ProcessDialogKey(keyData);
    }

    protected override bool ProcessDataGridViewKey(KeyEventArgs e)
    {
        if (e.KeyCode == Keys.Enter)
        {
            this.EndEdit();
            return true;
        }
        return base.ProcessDataGridViewKey(e);
    }

任何建议将不胜感激。我不知道从哪里开始。

EDIT 实际代码：

private BindingSource bindingSourceDependents = new BindingSource();
private MySqlDataAdapter dataAdapterDependents = new MySqlDataAdapter();
private DataTable dt_Dependents = new DataTable();
private void FillDataGridDependents()
{
    MySqlCommandBuilder cmb = new MySqlCommandBuilder(dataAdapterDependents);
    dataAdapterDependents.SelectCommand = new MySqlCommand("SELECT * FROM Dependents WHERE idGuarentors = " + guarentor.Id + ";", MySqlQueries_Global.MySqlCon());
    dt_Dependents = Guarentor.SelectDependents(guarentor.Id);
    bindingSourceDependents.DataSource = dt_Dependents;
    dataGridViewDependent.DataSource = bindingSourceDependents;
}
private void cellEndEdit(BindingSource bindingSource, DataGridView dg, MySqlDataAdapter da, string columnNameThatNN, int rowIndex, string columnNameForDup, string dupeMessage, Action<string> insertMethod, Action fillMethod)
{

   if (dg.Rows[rowIndex].Cells[columnNameThatNN].Value != DBNull.Value)
    {
        try
        {

            da.Update((DataTable)bindingSource.DataSource);
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
    }
    else
    {
        if (dg.Rows[rowIndex].Cells[columnNameForDup].Value != DBNull.Value)
        {
            string value = dg.Rows[rowIndex].Cells[columnNameForDup].Value.ToString();


            bool contains = ((DataTable)bindingSource.DataSource).AsEnumerable()
                           .Any(row => value.ToUpper() == row.Field<String>(columnNameForDup).ToUpper());
            if (!contains)
            {
                insertMethod(value);
            }
            else
            {
                MessageBox.Show(dupeMessage);
                fillMethod();
            }
        }
        else { fillMethod(); }
    }
}
void dataGridViewDependent_CellEndEdit(object sender, DataGridViewCellEventArgs e)
{
    cellEndEdit(bindingSourceDependents, dataGridViewDependent, dataAdapterDependents, "idDependents", e.RowIndex, "idDependents", "Critical ERROR contact admin!", dependent.blankmethod, FillDataGridDependents);
}

解决方案：

改变：

      da.Update(((DataTable)bindingSource.DataSource));

为：

bindingSource.ResetBindings(true);
  da.Update(((DataTable)bindingSource.DataSource));

Answer 1

改变：

 da.Update(((DataTable)bindingSource.DataSource));

为：

bindingSource.ResetBindings(true);
da.Update(((DataTable)bindingSource.DataSource));

由ProcessDataGridViewKey阻止的DataGridView更新数据源？

1 个答案: