TextBox

in namespace DotVVM.Framework.Controls

Renders a HTML text input control.

Usage & Scenarios

Renders a HTML text input control.

Sample 1: Binding Support

The TextBox control has the Text property which is used data-bind the value from the viewmodel.

page.dothtml
ViewModel.cs

<dot:TextBox Text="{value: Name}" />

<dot:TextBox Text="static text" />

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using DotVVM.Framework.ViewModel;

namespace DotvvmWeb.Views.Docs.Controls.builtin.TextBox.sample1
{
    public class ViewModel : DotvvmViewModelBase
    {
        public string Name { get; set; } = "John Green";
    }
}

Sample 2: TextBox Types

The TextBox control has the Type property which you can use to set up Password, Multiline or other types of a text field. Default value is Normal which renders type="text" on TextBox.

page.dothtml
ViewModel.cs

<!-- normal textbox -->
<dot:TextBox Text="{value: Text}" Type="Normal" />

<!-- password textbox -->
<dot:TextBox Text="{value: Password}" Type="Password" />

<!-- textarea -->
<dot:TextBox Text="{value: Message}" Type="MultiLine" />

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using DotVVM.Framework.ViewModel;

namespace DotvvmWeb.Views.Docs.Controls.builtin.TextBox.sample2
{
    public class ViewModel : DotvvmViewModelBase
    {
        public string Text { get; set; } = "Simple Text";

        public string Password { get; set; } = "1234";

        public string Message { get; set; } = "Message with \n multiple lines.";
    }
}

Sample 3: Changed Event and UpdateAfterKeydown

By default, if you type something in the TextBox, the value will be propagated in the viewmodel when the TextBox loses its focus. However, sometimes you need to update the TextBox immediately. Therefore, the TextBox also has the UpdateTextAfterKeydown which will propagate the value in the viewmodel after each key press.

The Changed event is triggered when the value of the control changes.

page.dothtml
ViewModel.cs

<dot:TextBox Text="{value: Text}" 
             UpdateTextAfterKeydown="true" 
             Changed="{command: TextToUpperCase()}"/>

{{value: Text}}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using DotVVM.Framework.ViewModel;

namespace DotvvmWeb.Views.Docs.Controls.builtin.TextBox.sample3
{
    public class ViewModel : DotvvmViewModelBase
    {
        public string Text { get; set; } = "";

        public void TextToUpperCase()
        {
            Text = Text.ToUpper();
        }
    }
}

Sample 4: TextBox Enabled with CheckBox

TextBox has Enabled property for setting if TextBox input is enabled. You can bind and switch it for example with CheckBox.

page.dothtml
ViewModel.cs

<p>
  <dot:CheckBox Checked="{value: IsCompany}" 
                Text="The customer is a company." />
</p>

<p>
  Company Number:
  <dot:TextBox Text="{value: CompanyNumber}"
               Enabled="{value: IsCompany}"/>
</p>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using DotVVM.Framework.ViewModel;

namespace DotvvmWeb.Views.Docs.Controls.builtin.TextBox.sample4
{
    public class ViewModel : DotvvmViewModelBase
    {
        public bool IsCompany { get; set; }

        public string CompanyNumber { get; set; } = "";
        
    }
}

Properties

Name	Type	Description	Notes	Default Value
ClientIDMode	ClientIDMode	Gets or sets the client ID generation algorithm.	attribute inner element static value bindable default	1
DataContext	Object	Gets or sets a data context for the control and its children. All value and command bindings are evaluated in context of this value.	attribute inner element static value bindable default	null
Enabled	Boolean	Gets or sets a value indicating whether the control is enabled and can be modified.	attribute inner element static value bindable default	True
FormatString	String	Gets or sets a format of presentation of value to client.	attribute inner element static value bindable default	null
ID	String	Gets or sets the unique control ID.	attribute inner element static value bindable default	null
InnerText	String	Gets or sets the inner text of the HTML element.	attribute inner element static value bindable default	null
Text	String	Gets or sets the text in the control.	attribute inner element static value bindable default
Type	TextBoxType	Gets or sets the mode of the text field.	attribute inner element static value bindable default	0
UpdateTextAfterKeydown	Boolean	Gets or sets whether the viewmodel property will be updated after the key is pressed. By default, the viewmodel is updated after the control loses its focus.	attribute inner element static value bindable default	False
ValueType	FormatValueType	Gets or sets the type of value being formatted - Number or DateTime.	attribute inner element static value bindable default	0
Visible	Boolean	Gets or sets whether the control is visible.	attribute inner element static value bindable default	True

Events

	Name	Type	Description
	Changed	Command	Gets or sets the command that will be triggered when the control text is changed.

HTML produced by the control

Depending on the Type property, the control renders either <input> or <textarea> element.

<input type="text" data-bind="..." />

<textarea data-bind="..."></textarea>