I'm new with c# and am wanting to set all panels to visible=false that share the same tag. This will prevent me from calling each panel name individually and setting it to false when activating a new panel.
Any help?
This is how I would do it the old way:
private void button3click (object sender, EventArgs e)
{
Panel1.Visible = false;
Panel2.Visible = false
Panel3.Visible = true;
}
If you have sets of controls that you frequently refer to as a group, then you can try to place those controls into a list:
List<Control> typeAControls = new List<Control>(){control1, control2};
List<Control> typeBControls = new List<Control>(){control3, control4};
foreach (var toHide in typeAControls)
{
toHide.Visible = false;
}
foreach (var toHide in typeBControls)
{
toHide.Visible = true;
}
Related
I'm starting out in wpf.
I have a TreeView in which each item has a checkbox.
I'm trying to create an animation in which The checkboxes are checked programmatically inside a loop.
After researching the topic for some time, I came up with the following method -
private void Traverse_Click(object sender, RoutedEventArgs e)
{
ItemCollection items = tvMain.Items;
Task.Factory.StartNew( ()=>
Dispatcher.Invoke( (Action)(() =>
{
foreach (TreeViewItem item in items)
{
UIElement elemnt = getCheckbox();
if (elemnt != null)
{
CheckBox chk = (CheckBox)elemnt;
chk.IsChecked = !chk.IsChecked;
tvMain.Items.Refresh();
tvMain.UpdateLayout();
Thread.Sleep(500);
}
}
})));
And yet despite all of my attempts the the tree doesn't update inside the loop, only at the end. so the checkboxes are all checked at once.
How can I make the tree update inside the loop?
Thanks
Replace Thread.Sleep with Task.Delay to "sleep" asynchronously:
private async void Traverse_Click(object sender, RoutedEventArgs e)
{
ItemCollection items = tvMain.Items;
foreach (TreeViewItem item in items)
{
UIElement elemnt = getCheckbox();
if (elemnt != null)
{
CheckBox chk = (CheckBox)elemnt;
chk.IsChecked = !chk.IsChecked;
await Task.Delay(500);
}
}
}
I'm trying to set AutomationId for dynamically created items. The example code is as following:
public Form1()
{
InitializeComponent();
var menu = new MenuStrip();
var item = new ToolStripMenuItem();
item.Text = "Plik";
item.Name = "File";
var subitem = new ToolStripMenuItem();
subitem.Text = "Nowy";
subitem.Name = "New";
item.DropDownItems.Add(subitem);
this.Controls.Add(menu);
menu.Items.Add(item);
this.MainMenuStrip = menu;
}
private void button1_Click(object sender, EventArgs e)
{
var formHandle = AutomationElement.FromHandle(this.Handle);
Condition propCondition = new PropertyCondition(
AutomationElement.NameProperty, "File");
var menuHandle = formHandle.FindFirst(TreeScope.Descendants, propCondition);
// menuHandle is null here
menuHandle.SetFocus();
}
Form itself has AutomationId equal to "Form1". However, created menu items doesn't seem to have AutomationID.
How can I manually set AutomationId for dynamically created control?
I try to add a RepositoryItemCheckEdit to my GridView using devexpress and Winforms. However, I can get only one checkbox be checked. If I check another one, the checkbox I checked before becomes unchecked. I followed everything I can find on the net, but couldn't make this work. What am I missing?
The code part I insert the column:
gcIsEmirleri.DataSource = (from i in isemirleri
select new
{
ID = i.isEmriId,
// other attributes
}).ToList();
GridColumn column = gvIsEmirleri.Columns["Sec"];
if (column == null)
{
gvIsEmirleri.BeginUpdate();
DataColumn col = new DataColumn("Sec", typeof(bool));
column = gvIsEmirleri.Columns.AddVisible("Sec");
col.VisibleIndex = 0;
col.Caption = "Sec";
col.Name = "Sec";
col.OptionsColumn.AllowEdit = true;
gvIsEmirleri.EndUpdate();
gvIsEmirleri.Columns["Sec"].UnboundType = DevExpress.Data.UnboundColumnType.Boolean;
RepositoryItemCheckEdit chk = new RepositoryItemCheckEdit();
chk.ValueChecked = true;
chk.ValueUnchecked = false;
gvIsEmirleri.Columns["Sec"].ColumnEdit = chk;
chk.QueryCheckStateByValue += chk_QueryCheckStateByValue;
}
The code part I make the checkbox two-stated instead of three:
private void chk_QueryCheckStateByValue(object sender, DevExpress.XtraEditors.Controls.QueryCheckStateByValueEventArgs e)
{
if (e.Value == null)
{
e.CheckState = CheckState.Unchecked;
e.Handled = true;
}
}
EDIT: I created a List<bool> chkList; and do the following operations:
This function is added to checkedits' CheckStateChanged:
private void chk_CheckStateChanged(object sender, EventArgs e)
{
CheckEdit chk = sender as CheckEdit;
if (chk.Checked)
chkList[gvIsEmirleri.FocusedRowHandle] = true;
else
chkList[gvIsEmirleri.FocusedRowHandle] = false;
FillBindingSource();
}
In FillBindingSource I added the lines:
for (int i = 0; i < chkList.Count; i++)
{
if (chkList[i])
gvIsEmirleri.SetRowCellValue(i, "Sec", true);
}
I debug these lines, I see that List has correct bool values and gvIsEmirleri.SetRowCellValue(i, "Sec", true); is operated when it has to. However, it still doesn't work.
My guess is : You are using an unbound Column, and you are not saving the checked / unckecked info, so, after the selected row is left, the checkBox get it's initial value (unckecked).
For this, I suggest you handle the CustomUnboundColumnData event of your view. Here is a simple :
readonly Dictionary<object, bool> checkedMap = new Dictionary<object, bool>();
private void viewScales_CustomUnboundColumnData(object sender, CustomColumnDataEventArgs e)
{
// Check what column
if (e.Column != gvIsEmirleri.Columns["Sec"])
return;
if (e.IsGetData)
{
// check if the row has been checked and set it's value using e.Value
bool checked;
if (checkedMap.TryGetValue(e.Row, out checked))
e.Value = checked;
}
if (e.IsSetData)
{
var checked = Convert.ToBoolean(e.Value);
// Check if the key already exist
if (checkedMap.ContainsKey(e.Row))
scaleMap.Remove(e.Row);
checkedMap.Add(e.Row, checked);
}
}
Note : This is the way I resolved a similar problem, but I did not test the code I just wrote.
I have a ToolStrip with multiple ToolStripDropDownButtons, each has a set of DropDownItems.
When the user clicks on an DropDownItem, the check mark is shown.
By default, multiple items can be clicked and therefore multiple check marks appear.
What I'm trying to do is when the user clicks one DropDownItem, the other already checked items should be unchecked. In other words, there should always be only one checked item in the DropDown list.
I've been dabbling with it for some time but I can't really figure out how to keep the current checked item as it is while uncheck other items.
Below is the code I have as of now.
private void subietm1ToolStripMenuItem_Click(object sender, EventArgs e)
{
UncheckOtherToolStripMenuItems(sender);
}
public void UncheckOtherToolStripMenuItems(object selectedMenuItem)
{
List<ToolStripDropDownButton> dropdownButtons = new List<ToolStripDropDownButton>();
foreach (ToolStripItem item in toolStrip1.Items)
{
if (item is ToolStripDropDownButton)
{
dropdownButtons.Add((ToolStripDropDownButton)item);
}
}
foreach (ToolStripDropDownButton btn in dropdownButtons)
{
foreach (ToolStripMenuItem d in btn.DropDownItems)
{
if (d.Checked)
d.CheckState = CheckState.Unchecked;
}
}
}
If someone could shed some light on this or tell me an easy way to go about it, I'd be grateful.
Thank you.
So easy...
Implement their method as described below:
private void subietm1ToolStripMenuItem_Click(object sender, EventArgs e)
{
UncheckOtherToolStripMenuItems((ToolStripMenuItem)sender);
}
public void UncheckOtherToolStripMenuItems(ToolStripMenuItem selectedMenuItem)
{
selectedMenuItem.Checked = true;
// Select the other MenuItens from the ParentMenu(OwnerItens) and unchecked this,
// The current Linq Expression verify if the item is a real ToolStripMenuItem
// and if the item is a another ToolStripMenuItem to uncheck this.
foreach (var ltoolStripMenuItem in (from object
item in selectedMenuItem.Owner.Items
let ltoolStripMenuItem = item as ToolStripMenuItem
where ltoolStripMenuItem != null
where !item.Equals(selectedMenuItem)
select ltoolStripMenuItem))
(ltoolStripMenuItem).Checked = false;
// This line is optional, for show the mainMenu after click
selectedMenuItem.Owner.Show();
}
One detail is that you can implement the same method for all click menuItens, for this add same call for method UncheckOtherToolStripMenuItems((ToolStripMenuItem)sender); into the Event click for each ToolstripMenuItem, see this example to the another two ToolstripMenuItens:
private void subietm2ToolStripMenuItem_Click(object sender, EventArgs e)
{
UncheckOtherToolStripMenuItems((ToolStripMenuItem)sender);
}
private void subietm3ToolStripMenuItem_Click(object sender, EventArgs e)
{
UncheckOtherToolStripMenuItems((ToolStripMenuItem)sender);
}
I just set all the items in my menu with the event of item_Click so if one is clicked then it will just run the code below. Dont need an event for each button that way.
private void item_Click(object sender, EventArgs e)
{
// Set the current clicked item to item
ToolStripMenuItem item = sender as ToolStripMenuItem;
// Loop through all items in the subMenu and uncheck them but do check the clicked item
foreach (ToolStripMenuItem tempItemp in (ToolStripMenuItem)item.OwnerItem.DropDownItems)
{
if (tempItemp == item)
tempItemp.Checked = true;
else
tempItemp.Checked = false;
}
}
If you want to add several items to your list during runtime and have them connected in the way above you can run the below code.
private void subItemsMenus(ToolStripMenuItem parentItem, string[] listItems)
{
// Clear tool strip items first
parentItem.DropDownItems.Clear();
// Add items that are in the list
foreach (string subMenuItem in listItems)
{
ToolStripMenuItem item = new ToolStripMenuItem();
//Name that will appear on the menu
item.Text = subMenuItem;
//Put in the Name property whatever necessary to retrieve your data on click event
item.Name = subMenuItem;
//On-Click event
item.Click += new EventHandler(item_Click);
//Add the submenu to the parent menu
parentItem.DropDownItems.Add(item);
}
I have another way which works:
Each item is going to ToolStripMenuItem_CheckStateChanged(object sender, EventArgs e)
and every item has its own tag 1, 2, 3, 4, 5.
One item is checked on start and has tag = 1.
int selecteditem = 1;
bool atwork = false;
private void dzienToolStripMenuItem_CheckStateChanged(object sender, EventArgs e)
{
if (atwork) return;
else atwork = true;
selecteditem = Convert.ToInt32(((ToolStripMenuItem)sender).Tag);
foreach (ToolStripMenuItem it in sometooltipdropdown.DropDownItems)
{
if (Convert.ToInt32(it.Tag) != selecteditem)
{
it.Checked = false;
}
}
atwork = false;
}
The easiest way is add DropDownItemClicked Event and create own method:
private void toolStripDropDownButton1_DropDownItemClicked(object sender, ToolStripItemClickedEventArgs e)
{
if (e.ClickedItem != null)
{
CheckSelected((ToolStripDropDownButton)sender, e.ClickedItem);
}
}
private void CheckSelected(ToolStripDropDownButton button, ToolStripItem selectedItem)
{
foreach (ToolStripMenuItem item in button.DropDownItems)
{
item.Checked = (item.Name == selectedItem.Name) ? true : false;
}
}
You could get the count by copying to an array and then use extensions.
ToolStripItem[] controls = new ToolStripItem[ToolStrip.DropDownItems.Count];
ToolStrip.DropDownItems.CopyTo(controls,0);
intcheckCount = controls.Count(c => (c as ToolStripMenuItem).Checked);
if (checkCount == 0) // must keep 1 selection
item.Checked = true;
else if (checkCount > 1) //uncheck all others
controls.Cast<ToolStripMenuItem>().Where(c => c.Checked && c.Name != item.Name)
.ToList().ForEach(s => s.Checked = false);
Hi I'm having a bit trouble with locking my columns in my datagrid in silverlight.
void proxy_ListAllGroupsCompleted(object sender, gkws.ListAllGroupsCompletedEventArgs e)
{
grouplist = e.Result;
List<allGroups> source = new List<allGroups>();
for (int i = 0; i < grouplist[0].Count; i++)
{
source.Add(new allGroups()
{
ID = Convert.ToInt32(grouplist[0][i]),
Name = grouplist[1][i],
CreationDate = grouplist[2][i],
Creator = grouplist[3][i]
});
}
mainGroupDG.ItemsSource = source;
mainGroupDG.Columns[0].IsReadOnly = true;
mainGroupDG.Columns[2].IsReadOnly = true;
mainGroupDG.Columns[3].IsReadOnly = true;
}
When I debug I get the error "Index was out of range". Although my datagrid auto-generates the column before I try to lock them.
Thanks for the help.
Wardh
The problem is that when you're setting the IsReadOnly, the columns have yet to be created.
What you need to do is to catch an event from the DataGrid that happens AFTER the columns have been created. for example, you could do this:
private void dataGrid1_AutoGeneratingColumn(object sender, DataGridAutoGeneratingColumnEventArgs e)
{
e.Column.IsReadOnly = true;
}