NavigationFilterInfo.Value Property

Returns the FilterString value.

Namespace: DevExpress.Blazor

Assembly: DevExpress.Blazor.v22.1.dll

NuGet Package: DevExpress.Blazor

Declaration

public string Value { get; }

Property Value

Type	Description
String	The FilterString value.

Remarks

Use the Value property to access the DxTreeView.FilterString or DxAccordion.FilterString value.

The following example uses the Value property to get the DxTreeView.FilterString value and divide this string by a comma:

@page "/"
@using TreeViewCustomFilter.Data
@using System.Text.RegularExpressions;

<DxTreeView Data="@OfficeLocation.Offices"
            @bind-FilterString=FilterString
            ShowFilterPanel="true"
            CustomFilter=@CustomFilter>
    <NodeTextTemplate>
        <span>
            @Template(context)
        </span>
    </NodeTextTemplate>
    <DataMappings>
        <DxTreeViewDataMapping Key="Id" ParentKey="ParentId" Text="Name" />
    </DataMappings>
</DxTreeView>

@code {
   static IEnumerable<string> SplitByComma(string value) => value
           .Split(',', StringSplitOptions.TrimEntries | StringSplitOptions.RemoveEmptyEntries);
   string? FilterString { get; set; }
   bool CustomFilter(ITreeViewNodeInfo info) {
       return SplitByComma(info.FilterInfo.Value)
           .Any(word => info.Text.Contains(word, StringComparison.InvariantCultureIgnoreCase));
   }
   RenderFragment Template(ITreeViewNodeInfo info) {
       if(!info.FilterInfo.IsApplied)
           return @<text>@info.Text</text>;
       var words = SplitByComma(info.FilterInfo.Value);
       var pattern = $"(" + string.Join(")|(", words) + ")";
       var matched = Regex.Split(info.Text, pattern, RegexOptions.IgnoreCase | RegexOptions.CultureInvariant);
       return
           @<text>
               @foreach(var m in matched) {
                   @if(Regex.IsMatch(m, pattern, RegexOptions.IgnoreCase | RegexOptions.CultureInvariant)) {
                       <span class="dxbl-filter-content">@m</span>
                   }
                   else { @m }
               }
           </text>;
   }
}

View Example: Implement Custom Filter