textbox

how to restrict the length of entries in text box to its width

由 末鹿安然 提交于 2020-01-03 05:42:05
问题 c#: By default text box accepts n number of entries, I want to restrict the entries to its width Is there any property in text box through which i can achive this, 回答1: You could compute the width of the text to be drawn and if it exceeds the textbox width then return. HERE you can find a great example. 回答2: default it accepts only 32767 of chars. You can set the MaxLength property of the textbox in the textbox property Hope you are using windows forms 回答3: Assuming WinForms, try this:

WPF TextBox TextProperty metadata override

由 时间秒杀一切 提交于 2020-01-03 03:51:07
问题 How to override the TextProperty Metadata to set the UpdateSourceTrigger.PropertyChanged by default while using the functionality from the base TextBox Class TextBox.OnTextPropertyChanged TextBox.CoerceText methods, when both mentioned are private ? public class MyTextBox : System.Windows.Controls.TextBox { static MyTextBox() { TextProperty.OverrideMetadata(typeof(TextBox), new FrameworkPropertyMetadata( string.Empty, FrameworkPropertyMetadataOptions.Journal | FrameworkPropertyMetadataOptions

Putting focus on a textbox in onchange event

由 ε祈祈猫儿з 提交于 2020-01-03 03:16:23
问题 I am trying to get it so that when a certain value is put into a textbox, the focus will stay on the textbox(and an alert will be shown in production). I am trying to get this to work in Firefox 3.5.7 with no luck. How can I make it so when a textbox is a certain value at onchange that it will stay focused/refocus on the textbox? Live example is at http://jsbin.com/ipina <body> Enter your name: <input type="text" name="fname" id="fname" onchange=" if(this.value=='foo'){ this.select(); this

Allow only one decimal point in a Text Box

由 ⅰ亾dé卋堺 提交于 2020-01-03 01:58:28
问题 I am designing a basic calculator using C#. I am facing difficulties while I am entering a decimal point. Example, if I am entering .8 then it gives me 0.8 which is correct if there is nothing on the display screen but after that if I am entering the decimal symbol, then also it accepts it that is 0.8..... I want only one decimal symbol to be accepted for one number. My code is private void btn_Decimal_Click(object sender, EventArgs e) { if (txt_Result.Text == "" || LastcharIssymbol==true) {

WPF: Trim all textboxes

由 十年热恋 提交于 2020-01-03 01:41:10
问题 I recently got a requirement that all the textboxes in my application should automatically trim the text when leaving the textbox. I can't/don't want to do this by adding converters or events to every single textbox, or by writing/rewriting the properties in my viewmodel for every single binding. First, it will be very messy and repetetive, second, I already have converters for many of my textboxes, and afaik, you can't connect multiple converters without writing a multiconverter. Since you

TextBox Events in C#

由 人走茶凉 提交于 2020-01-02 20:18:23
问题 I have a TextBox. After leaving the textBox the first character should be a capital Letter. Three Events work as same. They are Leave,Validating and Validated. if (txtLocl.Text.Length > 0) txtLocl.Text = txtLocl.Text.Substring(0, 1).ToUpper() + txtLocl.Text.Substring(1); Which event of these 3 events should I use? 回答1: You can subscribe to the Control.Leave event which will be fired when the control loses focus. Originally, I thought using Control.LostFocus would be the most appropriate event

Change text box value of an iframe on a different domain using jQuery?

由 我怕爱的太早我们不能终老 提交于 2020-01-02 12:21:11
问题 I have an Iframe for a page that allows people to sign up for my email newsletters. I want to auto fill the email field in the iframe based on the querystring url (page.html?email=email) I know how to do the querystring stuff, I'm just not sure If I'm able to access the input text box within the frame. The form or the textbox neither have id's they only have names. I've tried the following.. $("email_frame").contents.find('input[name=email]').append("test"); Any help would be great. 回答1: If

how to separate the background image in wpf textbox?

由 大兔子大兔子 提交于 2020-01-02 09:51:16
问题 I am new to WPF. In my project i have tried user name textbox box with usericon. My XAML Code:- > <TextBox Height="30" Width="180" Margin="67,123,256,158"> > <TextBox.Background> > <ImageBrush ImageSource="Images/User.png" Stretch="None" AlignmentX="Left" AlignmentY="Center" /> > </TextBox.Background> > </TextBox> But when i type the user name, text-box cursor starts from the left end, two or three letters are not visible and its looking ugly. (see the image) How i can separate this

Spell checking doesn't work with WPF RichTextBox

由 北城以北 提交于 2020-01-02 07:32:09
问题 I'm trying to enable spell checking in a WPF RichTextBox. MSDN writes that System.Windows.Controls.SpellCheck can be used to enable spell checking for TextBox and RichTextBox controls. Unfortunately, the following code doesn't work for me: <RichTextBox SpellCheck.IsEnabled="True" xml:lang="en-US"></RichTextBox> Which is strange, because if I use a plain TextBox, it works perfectly fine (I can see the red lines if I miss-spell something). Unfortunately, every answer I've found on SO so far

How to identify the ValidationError ToolTip Placement in WPF TextBox

由 只谈情不闲聊 提交于 2020-01-02 06:25:12
问题 I have added a Arrow to Indicate the TextBox from ToolTip. This Works great when the TextBox is far away from the Screen Edge. But When it is near the Screen edge. The ToolTip Placement changes and the Arrow is shown on Left. Here is the Image Correct as expected, since TextBox in away from edges. But when TextBox is near to edges. I see this I want to see the Arrow in the second image on the right side of tooltip. Here is the code <Grid Grid.Column="0" Width="10" Margin="1,0,-1,0" Background
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