Datagrid列IsReadOnly属性在Silverlight 4中不起作用？ [英] Datagrid column IsReadOnly property not working in Silverlight 4?

问题描述

我目前正在处理一个DataGrid，在某些情况下，通过将 IsReadOnly 更改为true来禁用或启用特定的列，反之亦然。
我附加到 CurrentCellChanged 和 CellEditEnded 事件，其中我更改列 IsReadOnly 属性。
我期望应用程序在该列上禁用/启用编辑。
即使列有 IsReadOnly 设置为true有时它允许编辑。
我也试图在网格上调用 CancelEdit（）; ，但也没有任何影响。
如果您要求我可以发布代码，但我很确定逻辑是正确的，我检查它像数千次调试;）。
整个想法只不过是改变事件中特定列的IsReadOnly。
任何想法，为什么它不能像我预期的那样工作？

I'm currently working on a DataGrid which in some conditions should disable or enable particular columns by changing IsReadOnly to true and vice versa. I attached to CurrentCellChanged and CellEditEnded events in which I change the column IsReadOnly property. I expect the application to disable / enable edit on that column. Even though the column has IsReadOnly set to true sometimes it does allow edits. I've also tried to call CancelEdit(); on a grid but that didn't make any effect either. If you request I can post code but I'm pretty sure the logic is fine, I checked it like thousands of times in debug ;). The entire idea is nothing more than changing IsReadOnly of particular column in event. Any idea what why it's not working as I expect?

Edit1。
添加代码

Edit1. Code added.

        private void SrfDataGrid_CurrentCellChanged(object sender, EventArgs e)
    {
        CellCoordinates cellCoordinates = this.GetEditedCellCoordinates();
        if (!this.LockDataGridCell(cellCoordinates))
        {
            if (!Keyboard.Modifiers.HasFlag(ModifierKeys.Control) && !Keyboard.Modifiers.HasFlag(ModifierKeys.Shift))
                this.srfDataGrid.BeginEdit();
        }
        else
        {
            this.srfDataGrid.CancelEdit();
        }
    }

    private void SrfDataGrid_CellEditEnded(object sender, DataGridCellEditEndedEventArgs e)
    {
        CellCoordinates cellCoordinates = this.GetEditedCellCoordinates();
        this.SetCellsRowInfluence(cellCoordinates);
        this.UnlockDataGridCell(cellCoordinates);
    }

    public bool LockDataGridCell(CellCoordinates cellCoordinates)
    {
        bool result = false;

        if (cellCoordinates != null)
        {
            DataGridColumn currentColumn = this.srfDataGrid.CurrentColumn;

            if (this.spreadSheetCellState[cellCoordinates.ColumnName, cellCoordinates.RowID].Equals(CurrentCellState.WRITE))
            {
                currentColumn.IsReadOnly = false;
            }
            else
            {
                currentColumn.IsReadOnly = true;
            }

            result = currentColumn.IsReadOnly;
        }

        return result;
    }

    public void UnlockDataGridCell(CellCoordinates cellCoordinates)
    {
        if (cellCoordinates != null)
        {
            DataGridColumn currentColumn = this.srfDataGrid.CurrentColumn;

            if (this.spreadSheetCellState[cellCoordinates.ColumnName, cellCoordinates.RowID].Equals(CurrentCellState.ALWAYS_READ_ONLY))
            {
                currentColumn.IsReadOnly = true;
            }
            else
            {
                currentColumn.IsReadOnly = false;
            }
        }
    }

推荐答案

尝试这样：

foreach (DataGridColumn col in dataGrid1.Columns)
        {
            if (col.GetType() == typeof(DataGridTextColumn))
            {
                col.IsReadOnly = true;
            }
            else
            {
                col.IsReadOnly = false;
            }
        }

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