GanttTaskListSettings.Columns Property

Accesses the columns in the task list.

Namespace: DevExpress.Web.ASPxGantt

Assembly: DevExpress.Web.ASPxGantt.v24.2.dll

Declaration

C#

[DefaultValue(null)]
public GanttColumnCollection Columns { get; }

VB.NET

<DefaultValue(Nothing)>
Public ReadOnly Property Columns As GanttColumnCollection

Property Value

Type	Default	Description
GanttColumnCollection	null	A collection of Gantt columns.

Property Paths

You can access this nested property as listed below:

Library	Object Type	Path to Columns
ASP.NET MVC Extensions	GanttSettings	.SettingsTaskList .Columns
ASP.NET Web Forms Controls	ASPxGantt	.SettingsTaskList .Columns

Remarks

The ASPxGantt stores its columns in the Columns collection. This collection’s methods allow you to add and remove columns.

Available column types:

Column Type	Description
GanttCommandColumn	A command column.
GanttCheckColumn	A column that displays Boolean values.
GanttColorEditColumn	A column that displays color values.
GanttDateTimeColumn	A data column that displays DateTime values.
GanttProgressBarColumn	A column that displays a progress bar.
GanttSpinEditColumn	A data column that displays numeric values.
GanttTextColumn	A data column that displays text values.
GanttTimeEditColumn	A data column that displays time portions of DateTime values.

Create a Column

Create a column, specify its FieldName property, and add this column to the control’s Columns collection.

In markup:

ASPX

<dx:ASPxGantt ID="Gantt" runat="server"...>
    ...
    <SettingsTasksList >
        <Columns>
            <dx:GanttTextColumn FieldName="Title" Caption="Subject" />
            <dx:GanttProgressBarColumn FieldName="Progress" />
            ...
        </Columns>
    </SettingsTasksList>
</dx:ASPxGantt>

In Code:

C#

GanttTextColumn title = new GanttTextColumn();
title.FieldName = "Title";
title.Caption = "Subject";

GanttProgressBarColumn taskProgress = new GanttProgressBarColumn();
taskProgress.FieldName = "Progress";

Gantt.SettingsTaskList.Columns.Add(title);
Gantt.SettingsTaskList.Columns.Add(taskProgress);

Access a Column

Use the Item[Int32] property to access individual columns by their index in the column collection.

C#

GanttTextColumn colFirstColumn = ASPxGantt1.SettingsTaskList.Columns[0];

Specify a Column Width

Use the ColumnMinWidth property to specify the minimum width for all columns in the Gantt.

ASPX

<dx:ASPxGantt ID="Gantt" runat="server" ... >
    <SettingsTasksList Width="45%" ColumnMinWidth="50" >
        ...
    </SettingsTasksList>
</dx:ASPxGantt>

To specify the minimum width for an individual column, use the MinWidth property.

ASPX

<dx:ASPxGantt ID="Gantt" runat="server" ... >
    <SettingsTasksList Width="45%" >
        <Columns>
            <dx:GanttTextColumn FieldName="Subject" Width="360" MinWidth="100" />
            <dx:GanttDateTimeColumn FieldName="StartDate" Width="100" MinWidth="70" />
        </Columns>
    </SettingsTasksList>
</dx:ASPxGantt>

Column Editor

Each data column type has an editor in edit mode. For example, the GanttCheckColumn column allows you to edit Boolean values in a checkbox editor.

Use the column’s Properties[Editor_Name] property to access column editor settings.

ASPX

<dx:ASPxGantt ID="Gantt" runat="server"...>
    ...
    <SettingsTasksList >
        <Columns>
            <dx:GanttSpinEditColumn FieldName="Passengers">
                <PropertiesSpinEdit MinValue="0" MaxValue="400" />
            </dx:GanttSpinEditColumn>
            ...
        </Columns>
    </SettingsTasksList>
</dx:ASPxGantt>

Online Demo

ASPxGantt - Columns