say I have added many textboxes. How to iterate or loop thru all the textboxes and do some checking. Check if each textbox's content is a number.
Below is the code for winForm, how to do in in WinRT?
foreach (Control item in GroupBox1.Controls)
{
if (item.GetType() == typeof(TextBox))
{
if (string.IsNullOrEmpty( ((TextBox)item).Text))
{
//Empty text in this box
}
}
}
Thanks.
This is how you do what you want.
public MainPage()
{
this.InitializeComponent();
Loaded += MainPage_Loaded;
}
void MainPage_Loaded(object sender, RoutedEventArgs e)
{
foreach (var textBox in AllTextBoxes(this))
{
textBox.Text = "Hello world";
}
}
List<TextBox> AllTextBoxes(DependencyObject parent)
{
var list = new List<TextBox>();
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(parent); i++)
{
var child = VisualTreeHelper.GetChild(parent, i);
if (child is TextBox)
list.Add(child as TextBox);
list.AddRange(AllTextBoxes(child));
}
return list;
}
Reference: http://blog.jerrynixon.com/2012/09/how-to-access-named-control-inside-xaml.html
Best of luck!
You can do like this. Each page will have a container of UIElements
, so I am using Grid
. You can also do same with StackPanel
also. I am iterating through its children and checking if it's Textbox
or not.
XAML
<Grid x:Name="rootGrid" Background="{StaticResource ApplicationPageBackgroundThemeBrush}">
<TextBox Height="51" Margin="210,103,0,0" Text="TextBox" Width="135"/>
<TextBox Height="51" Margin="459,149,0,0" Text="TextBox" Width="135"/>
<TextBox Height="51" Margin="277,279,0,0" Text="TextBox" Width="135"/>
<TextBox Height="51" Margin="580,279,0,0" Text="TextBox" Width="135"/>
<TextBlock Height="63" Margin="227,494,0,0" Text="TextBlock" Width="142"/>
<TextBlock Height="63" Margin="479,469,0,0" Text="TextBlock" Width="142"/>
<TextBlock Height="63" Margin="573,406,0,0" Text="TextBlock" Width="142"/>
<TextBlock Height="63" Margin="143,352,0,0" Text="TextBlock" Width="142"/>
<CheckBox Content="CheckBox" Height="81" Margin="1064,203,0,0" Width="130"/>
<CheckBox Content="CheckBox" Height="81" Margin="713,119,0,0" Width="130"/>
<CheckBox Content="CheckBox" Height="81" Margin="831,352,0,0" Width="130"/>
</Grid>
C#
protected override void OnNavigatedTo(NavigationEventArgs e)
{
foreach (var child in rootGrid.Children)
{
if (child is TextBox)
{
System.Diagnostics.Debug.WriteLine(((TextBox)child).Text);
if (string.IsNullOrEmpty(((TextBox)child).Text))
{
//Empty text in this box
}
}
}
}
//in asp.net c# if you have not masterpage
foreach (Control ctrl in Page.Controls)
{
if (ctrl is TextBox)
{
((TextBox)ctrl).Text = string.Empty;
}
}
/if you have master page then/
foreach (Control item in Page.Form.FindControl("ContentPlaceHolder1").Controls) { if (item is TextBox) { ((TextBox)item).Text = string.Empty; } }
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