DataGridViewTextBoxCell.ReadOnly = true,但仍可以更改所选值

时间:2018-01-27 00:04:47

标签: c# datagridview datagridviewcheckboxcell datagridviewtextboxcell

DataGridViewComboBoxCell.ReadOnly = true, but can still change the selected value有同样的问题,但用户对我无法实现的答案感到满意。

我有一个包含许多列的dataGridView,其中一列是checkBoxColumn,它应该激活或停用另一个包含文本的列:

enter image description here

现在,一旦加载了dataGridView,我得到的代码就完美了:我点击复选框,它们按预期工作。

问题是我希望dataGridView禁用在加载时间内没有检查相应Allergies单元格的AllergiesDescription单元格。我编写了一个代码,它应该迭代行并在找到未经检查的Allergies单元时执行禁用单元代码。但是不顾一切,它不起作用!它将所有想要的属性设置为单元格(如readonly = true),但单元格仍然可编辑:

enter image description here

在下面分享我的代码:

    private void dataGridView_CellContentClick(object sender,
        DataGridViewCellEventArgs cellEvent)
    {
        if (cellEvent.ColumnIndex == AllergiesCheckBoxColumn.Index)
            toggleAllergiesDescriptionHabilitation(cellEvent.RowIndex);
    }

    private void toggleAllergiesDescriptionHabilitation(int rowIndex)
    {
        int columnIndex = AllergiesDescriptionTextBoxColumn.Index;
        DataGridViewRow row = dataGridView.Rows[rowIndex];
        var allergiesDescriptionCell = (DataGridViewTextBoxCell)row.Cells[columnIndex];
        var currentCell = (DataGridViewCheckBoxCell)dataGridView.CurrentCell;
        if ((bool)currentCell.EditedFormattedValue)
            enableCell(allergiesDescriptionCell);
        else
            disableCell(allergiesDescriptionCell);
    }

    private void enableCell(DataGridViewTextBoxCell cell)
    {
        cell.ReadOnly = false;
        cell.Style.BackColor = Color.White;
        cell.Style.ForeColor = Color.Black;
        cell.Style.SelectionBackColor = Color.Blue;
        cell.Style.SelectionForeColor = Color.White;
    }

    private void disableCell(DataGridViewTextBoxCell cell)
    {
        cell.ReadOnly = true;
        cell.Style.BackColor = Color.LightGray;
        cell.Style.ForeColor = Color.DarkGray;
        cell.Style.SelectionBackColor = Color.LightGray;
        cell.Style.SelectionForeColor = Color.DarkGray;
    }

该代码完美如我所说,每当我检查Allergies复选框时,相应的AllergiesDescription单元格会按预期启用或禁用。但是:

    public People(PersistenceManager persistenceManager)
    {
        InitializeComponent();
        //other stuff
        disableNotCheckedAllergiesDescription();
    }

    private void disableNotCheckedAllergiesDescription()
    {
        foreach (DataGridViewRow row in dataGridView.Rows)
        {
            Person person = (Person)row.DataBoundItem;
            if (person != null && !person.Allergies)
                disableNotCheckedAllergiesDescription(row);
        }
    }

    private void disableNotCheckedAllergiesDescription(DataGridViewRow row)
    {
        int columnIndex = AllergiesDescriptionTextBoxColumn.Index;
        var allergiesDescriptionCell = (DataGridViewTextBoxCell)row.Cells[columnIndex];
        disableCell(allergiesDescriptionCell);
    }

这不起作用,正如您所看到的,它只对每个应该禁用的单元执行disableCell代码,当我调试时,未经检查的行正确输入方法disableCell,并且它们的readonly值正确设置为true ,但它们仍然可以编辑。

1 个答案:

答案 0 :(得分:1)

当您从构造函数内部调用DataGridCells时,设置ReadOnly属性似乎很早。试着移动你的电话:

disableNotCheckedAllergiesDescription();
而不是

到DataBindingComplete事件。