ComboBoxProperties.ValueType Property

Gets the data type of the editor’s values.

Namespace: DevExpress.Web

Assembly: DevExpress.Web.v18.2.dll

Declaration

C#

[DefaultValue(typeof(string))]
public Type ValueType { get; set; }

VB.NET

<DefaultValue(GetType(String))>
Public Property ValueType As Type

Property Value

Type	Default	Description
Type	string	A Type object that represents the type of values.

Remarks

The ValueType property’s value affects the data type used to specify the ListEditItem.Value property of the editor’s items.

The ValueType property supports the following values.

• System.Boolean
• System.Int16
• System.Int32
• System.String
• System.Char
• System.Byte
• System.Guid

Note

The ValueType property synchronizes its value with the editor’s ASPxComboBox.ValueType property.

Example

The following example demonstrates how to use the ASPxAutoCompleteBoxBase.TextFormatString property for a ASPxComboBox which contains several columns. The text of the selected ASPxComboBox item displayed within the input box is formatted by the ASPxAutoCompleteBoxBase.TextFormatString property. This property value is specified with respect to the selected ASPxRadioButtonList item. The complete sample project is available in the DevExpress Code Central database at E1331.

ASPX

...
<script runat="server">
    protected void ASPxRadioButtonList1_SelectedIndexChanged(object sender, EventArgs e) {
        if (ASPxRadioButtonList1.SelectedIndex == 0) { 
            ASPxComboBox1.TextFormatString = "{0} {1}, {2} Company";   
        }
        if (ASPxRadioButtonList1.SelectedIndex == 1) { 
            ASPxComboBox1.TextFormatString = "{1} {0}, {2} Company";
        }      
    }
 </script>
...
        <dxe:ASPxRadioButtonList ID="ASPxRadioButtonList1" runat="server" 
            onselectedindexchanged="ASPxRadioButtonList1_SelectedIndexChanged" 
            ClientInstanceName="rbl">
            <ClientSideEvents SelectedIndexChanged="function(s, e) {
                e.processOnServer=true;
            }" />
            <Items>
                <dxe:ListEditItem Text="FirstName LastName, Company" Value="Format1" />
                <dxe:ListEditItem Text="LastName FirstName, Company" Value="Format2" />
            </Items>
        </dxe:ASPxRadioButtonList>
        <br/>
        <dxe:ASPxComboBox ID="ASPxComboBox1" runat="server" 
            DataSourceID="AccessDataSource1" EnableIncrementalFiltering="True" 
            TextFormatString="{0} {1}, {2} Company" ValueType="System.String" Width="450px">
            <Columns>
                <dxe:ListBoxColumn Caption="First Name" FieldName="FirstName" 
                    Name="FirstName" />
                <dxe:ListBoxColumn Caption="Last Name" FieldName="LastName" Name="LastName" />
                <dxe:ListBoxColumn Caption="Company" FieldName="Company" Name="Company" />
            </Columns>
        </dxe:ASPxComboBox>
...

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the ValueType property.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

gridview-a-simple-implementation-of-cascading-comboboxes-in-batch-edit-mode-t155879/CS/Models/ComboBoxPropertiesProvider.cs#L73

cs.ValueField = "CountryId";
cs.ValueType = typeof(int);
cs.IncrementalFilteringDelay = 1000;

gridview-how-to-implement-cascaded-combo-boxes-in-the-editform-e4425/CS/Models/ComboBoxPropertiesProvider.cs#L73

cs.ValueField = "CountryId";
cs.ValueType = typeof(int);
cs.IncrementalFilteringDelay = 1000;

mvc-gridview-how-to-customize-an-exported-dataaware-excel-file-t385649/CS/T385649/Controllers/HomeController.cs#L58

var properties = (ComboBoxProperties)c.PropertiesEdit;
properties.ValueType = typeof(string);
properties.DataSource = MyModel.GetPositionDataSource();

VB.NET

gridview-a-simple-implementation-of-cascading-comboboxes-in-batch-edit-mode-t155879/VB/Models/ComboBoxPropertiesProvider.vb#L66

cs.ValueField = "CountryId"
cs.ValueType = GetType(Integer)
cs.IncrementalFilteringDelay = 1000

gridview-how-to-implement-cascaded-combo-boxes-in-the-editform-e4425/VB/Models/ComboBoxPropertiesProvider.vb#L66

cs.ValueField = "CountryId"
cs.ValueType = GetType(Integer)
cs.IncrementalFilteringDelay = 1000

mvc-gridview-how-to-customize-an-exported-dataaware-excel-file-t385649/VB/T385649/Controllers/HomeController.vb#L58

Dim properties = CType(c.PropertiesEdit, ComboBoxProperties)
properties.ValueType = GetType(String)
properties.DataSource = MyModel.GetPositionDataSource()