ASPxAutoCompleteBoxBase.FilterMinLength Property

Specifies the minimum length of the filter string.

Namespace: DevExpress.Web

Assembly: DevExpress.Web.v22.2.dll

NuGet Package: DevExpress.Web

Declaration

C#

[DefaultValue(0)]
public int FilterMinLength { get; set; }

VB.NET

<DefaultValue(0)>
Public Property FilterMinLength As Integer

Property Value

Type	Default	Description
Int32	0	The minimum length of the filter string.

Remarks

The editor starts to filter items when the filter string has the specified number of symbols.

In markup:

ASPX

<dx:ASPxComboBox ID="Countries" runat="server" EnableCallbackMode="True" FilterMinLength="3" DataSourceID="SqlDataSource1" TextField="City" ValueField="City">
</dx:ASPxComboBox>
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ...></asp:SqlDataSource>

In code:

C#

protected void Page_Load(object sender, EventArgs e){
    // Declare the editor.
    ASPxComboBox cb = new ASPxComboBox();
    cb.ID = "Countries";
    cb.EnableCallbackMode = true;
    cb.FilterMinLength = 3;
    form1.Controls.Add(cb);

    // Create and fill a dataset.
    SqlDataSource ds = new SqlDataSource(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\nwind.mdb;Persist Security Info=True", "SELECT [City] FROM [Customers]");
    ds.ProviderName = "System.Data.OleDb";
    ds.ID = "ds";

    // Specify the data source for the editor.
    cb.DataSource = ds;
    cb.ValueField = "City";
    cb.TextField = "City";
    cb.DataBind();
}

Run Demo: ASPxComboBox - Custom Data Binding