.NET Framework 4.8
Telerik controls 2022 R1
Only one of two checkbox columns can be checked at any given time for any given row.
What I'm experiencing is when one column is checked and the other is selected, both are then unchecked including the one clicked.
Sample project illustrating the issue is attached and the event handler code is below.
What am I doing wrong? Any help would be most appreciated.
TIA
Event handler code:
private void Dgv_MenuItems_ValueChanged(object sender, EventArgs e)
{
if (_settingItemAvail)
{
return;
}
if (sender != null && sender is RadCheckBoxEditor checkBoxEditor)
{
var cell = checkBoxEditor.EditorElement.Parent as GridDataCellElement;
var cellName = cell.ColumnInfo.Name;
var row = cell.RowInfo;
if (row.Index < 0)
{
return;
}
_settingItemAvail = true;
switch (cellName)
{
case "Unavailable":
if (checkBoxEditor.Value.ToString() == "On")
{
if ((bool)dgv_MenuItems.Rows[row.Index].Cells["Available"].Value)
{
dgv_MenuItems.Rows[row.Index].Cells["Available"].Value = false;
}
}
break;
case "Available":
if (checkBoxEditor.Value.ToString() == "On")
{
if ((bool)dgv_MenuItems.Rows[row.Index].Cells["Unavailable"].Value)
{
dgv_MenuItems.Rows[row.Index].Cells["Unavailable"].Value = false;
}
}
break;
}
_settingItemAvail = false;
}
}1 Answer, 1 is accepted
The provided sample project is greatly appreciated. If I understand your requirement correctly, you need to achieve only one of the GridViewCheckBoxColumns to be toggled per row. Hence, the row is either "Available" or "Unavailable". Please correct me if I am wrong.
Note that GridViewCheckBoxColumn offers the EditModeproperty. If you set it to EditMode.OnValueChange, the value will be committed to the respective cell as soon as the checkbox is toggled. Then, you should handle the RadGridView.CellValueChanged event and update the next checkbox cell.
private void Dgv_MenuItems_CellValueChanged(object sender, GridViewCellEventArgs e)
{
this.dgv_MenuItems.CellValueChanged -= Dgv_MenuItems_CellValueChanged;
if (e.Column.Name == "Unavailable"&& (bool)e.Row.Cells["Available"].Value)
{
e.Row.Cells["Available"].Value = false;
}
else if (e.Column.Name == "Available"&& (bool)e.Row.Cells["Unavailable"].Value)
{
e.Row.Cells["Unavailable"].Value = false;
}
this.dgv_MenuItems.CellValueChanged += Dgv_MenuItems_CellValueChanged;
}Regards,
Dess | Tech Support Engineer, Principal
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Des, you're a star!
Thanks for the help and have a great week!
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This is one of those rare examples where your C# to VB converter doesn't work.
The only bit I don't understand are the two line top & bottom. Could you translate them for us poor VB'ers please?
this.dgv_MenuItems.CellValueChanged -= Dgv_MenuItems_CellValueChanged;
and
this.dgv_MenuItems.CellValueChanged += Dgv_MenuItems_CellValueChanged;
Hi, Ian,
AddHandler and RemoveHandler are the missing pieces for subscribing/unsubscribing from events in VB:
AddHandler Me.dgv_MenuItems.CellValueChanged, AddressOf Dgv_MenuItems_CellValueChanged
RemoveHandler Me.dgv_MenuItems.CellValueChanged, AddressOf Dgv_MenuItems_CellValueChangedAdditional information can be found here: https://learn.microsoft.com/en-us/dotnet/visual-basic/programming-guide/language-features/events/#addhandler-and-removehandler
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Thanks - one of the few places where the C# and VB code look very different.
Perhaps you might change the C#/VB converter to understand this construct? It's a VERY useful little tool!
Hi, Ian,
Note that we don't have control over the exact C# to VB.NET conversion as we utilize an external library for this purpose. However, it is a good tool that facilitates the conversion process for our customers.