ASPxGridCustomCallbackEventArgs.Parameters Property

Gets a string that contains specific information (if any) passed from the client side.

Namespace: DevExpress.Web

Assembly: DevExpress.Web.v20.2.dll

NuGet Package: DevExpress.Web

Declaration

C#

public string Parameters { get; }

VB.NET

Public ReadOnly Property Parameters As String

Property Value

Type	Description
String	A string value that contains specific information collected on the client side and passed to the event for further server-side processing.

Remarks

Use the Parameters property to obtain specific information that has been collected on the client side and passed by the client PerformCallback method to the server for further server-side processing.

You can use the Parameters property to recognize different kinds of callbacks to perform different actions on the server side.

Example

C#

protected void Grid_CustomCallback(object sender, ASPxGridViewCustomCallbackEventArgs e) {
     if(e.Parameters == "ApplyCustomFilter")
          Grid.FilterExpression = "City = 'Bratislava'";
     if(e.Parameters == "ApplyCustomGrouping") { 
          Grid.DataColumns["City"].GroupBy();
          Grid.ExpandAll();
     }
}

VB.NET

Protected Sub Grid_CustomCallback(ByVal sender As Object, ByVal e As ASPxGridViewCustomCallbackEventArgs)
     If e.Parameters = "ApplyCustomFilter" Then
          Grid.FilterExpression = "City = 'Bratislava'"
     End If
     If e.Parameters = "ApplyCustomGrouping" Then
          Grid.DataColumns("City").GroupBy()
          Grid.ExpandAll()
     End If
End Sub

ASPX

<script type="text/javascript">
     function onApplyFilterButtonClick(s, e) {
          grid.PerformCallback("ApplyCustomFilter");
     }
     function onApplyGroupingButtonClick(s, e) {
          grid.PerformCallback("ApplyCustomGrouping");
     }
</script>
…

<dx:ASPxGridView ID="Grid" runat="server" KeyFieldName="ID" ClientInstanceName="grid" OnCustomCallback="Grid_CustomCallback">
     <Columns>
          <dx:GridViewDataColumn FieldName="ID" />
          <dx:GridViewDataColumn FieldName="FirstName" />
          <dx:GridViewDataColumn FieldName="LastName" />
          <dx:GridViewDataColumn FieldName="City" />
     </Columns>
</dx:ASPxGridView>

<dx:ASPxButton ID="ApplyFilterButton" runat="server" AutoPostBack="false" UseSubmitBehavior="false" Text="Apply Custom Filter">
     <ClientSideEvents Click="onApplyFilterButtonClick" />
</dx:ASPxButton>

<dx:ASPxButton ID="ApplyGroupingButton" runat="server" AutoPostBack="false" UseSubmitBehavior="false" Text="Apply Custom Grouping">
     <ClientSideEvents Click="onApplyGroupingButtonClick" />
</dx:ASPxButton>

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the Parameters 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#

how-to-implement-custom-behavior-for-an-expand-button-of-group-rows-e398/CS/ExpandRecursiveProgrammatically/Default.aspx.cs#L36

protected void ASPxGridView1_CustomCallback(object sender, DevExpress.Web.ASPxGridViewCustomCallbackEventArgs e) {
    if(e.Parameters == null) return;
    string[] param = e.Parameters.Split(';');

how-to-create-the-select-all-check-box-dynamically-e1181/CS/WebApplication3/Default.aspx.cs#L52

{
    bool isSelected = Convert.ToBoolean(e.Parameters);
    if (isSelected)

referring-to-a-web-controls-non-top-level-property-from-a-data-sources-controlparameter-illu-e2035/CS/ReferringHiddenFieldPropertyFromControlParameter/Default.aspx.cs#L12

protected void OnGridViewCustomCallback(object sender, ASPxGridViewCustomCallbackEventArgs e) {
    if(e.Parameters == "Rebind")
        ((ASPxGridView)sender).DataBind();

how-to-display-underlying-records-e1873/CS/ASPxPivotGrid_DisplayUnderlyingRecords/Default.aspx.cs#L18

ASPxGridViewCustomCallbackEventArgs e) {
if (e.Parameters == "D")
{

aspxgridview-how-to-manage-stored-files-of-different-types-e4645/CS/DevExpress.Upload/Default.aspx.cs#L86

protected void grid_CustomCallback(Object sender, ASPxGridViewCustomCallbackEventArgs e) {
    if(!String.IsNullOrEmpty(e.Parameters)) {
        var args = e.Parameters.Split(new[] { ':' }, 2);

VB.NET

how-to-implement-custom-behavior-for-an-expand-button-of-group-rows-e398/VB/ExpandRecursiveProgrammatically/Default.aspx.vb#L38

Protected Sub ASPxGridView1_CustomCallback(ByVal sender As Object, ByVal e As DevExpress.Web.ASPxGridViewCustomCallbackEventArgs)
    If e.Parameters Is Nothing Then
        Return

how-to-create-the-select-all-check-box-dynamically-e1181/VB/WebApplication3/Default.aspx.vb#L45

Protected Sub ASPxGridView1_CustomCallback(ByVal sender As Object, ByVal e As ASPxGridViewCustomCallbackEventArgs)
    Dim isSelected As Boolean = Convert.ToBoolean(e.Parameters)
    If isSelected Then

referring-to-a-web-controls-non-top-level-property-from-a-data-sources-controlparameter-illu-e2035/VB/ReferringHiddenFieldPropertyFromControlParameter/Default.aspx.vb#L15

Protected Sub OnGridViewCustomCallback(ByVal sender As Object, ByVal e As ASPxGridViewCustomCallbackEventArgs)
    If e.Parameters = "Rebind" Then
        DirectCast(sender, ASPxGridView).DataBind()

how-to-display-underlying-records-e1873/VB/ASPxPivotGrid_DisplayUnderlyingRecords/Default.aspx.vb#L18

                                       ByVal e As ASPxGridViewCustomCallbackEventArgs)
If e.Parameters = "D" Then
    ASPxGridView1.PageIndex = 0

aspxgridview-how-to-manage-stored-files-of-different-types-e4645/VB/DevExpress.Upload/Default.aspx.vb#L97

Protected Sub grid_CustomCallback(ByVal sender As Object, ByVal e As ASPxGridViewCustomCallbackEventArgs)
    If Not String.IsNullOrEmpty(e.Parameters) Then
        Dim args = e.Parameters.Split( { ":"c }, 2)