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Rows

Row represents a task information from the data source, and it is possible to perform the following actions in Gantt rows.

Row height

It is possible to change the height of the row in Gantt by setting row height in pixels to the RowHeight property. The following code example explains how to change the row height in Gantt at load time.

@using Syncfusion.EJ2.Blazor.Gantt
<EjsGantt DataSource="@TaskCollection" RowHeight=60 Height="450px" Width="900px">
    <GanttTaskFields Id="TaskId" Name="TaskName" StartDate="StartDate" EndDate="EndDate"
            Duration="Duration" Progress="Progress" Child="SubTasks">
    </GanttTaskFields>
</EjsGantt>

@code{
    public List<TaskData> TaskCollection { get; set; }
    protected override void OnInitialized()
    {
        this.TaskCollection = GetTaskCollection();
    }

    public class TaskData
    {
        public int TaskId { get; set; }
        public string TaskName { get; set; }
        public DateTime StartDate { get; set; }
        public DateTime EndDate { get; set; }
        public string Duration { get; set; }
        public int Progress { get; set; }
        public List<TaskData> SubTasks { get; set; }
    }

    public static List <TaskData> GetTaskCollection() {
    List <TaskData> Tasks = new List <TaskData> () {
        new TaskData() {
            TaskId = 1,
            TaskName = "Project initiation",
            StartDate = new DateTime(2019, 04, 02),
            EndDate = new DateTime(2019, 04, 21),
            SubTasks = (new List <TaskData> () {
                new TaskData() {
                    TaskId = 2,
                    TaskName = "Identify Site location",
                    StartDate = new DateTime(2019, 04, 02),
                    Duration = "0",
                    Progress = 30,
                },
                new TaskData() {
                    TaskId = 3,
                    TaskName = "Perform soil test",
                    StartDate = new DateTime(2019, 04, 02),
                    Duration = "4",
                    Progress = 40,
                },
                new TaskData() {
                    TaskId = 4,
                    TaskName = "Soil test approval",
                    StartDate = new DateTime(2019, 04, 02),
                    Duration = "0",
                    Progress = 30
                },
            })
        },
        new TaskData() {
            TaskId = 5,
            TaskName = "Project estimation",
            StartDate = new DateTime(2019, 04, 02),
            EndDate = new DateTime(2019, 04, 21),
            SubTasks = (new List <TaskData> () {
                new TaskData() {
                    TaskId = 6,
                    TaskName = "Develop floor plan for estimation",
                    StartDate = new DateTime(2019, 04, 04),
                    Duration = "3",
                    Progress = 30,
                },
                new TaskData() {
                    TaskId = 7,
                    TaskName = "List materials",
                    StartDate = new DateTime(2019, 04, 04),
                    Duration = "3",
                    Progress = 40
                },
                new TaskData() {
                    TaskId = 8,
                    TaskName = "Estimation approval",
                    StartDate = new DateTime(2019, 04, 04),
                    Duration = "0",
                    Progress = 30,
                }
            })
        }
    };

    return Tasks;
}
}

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Expand/Collapse Row

In Gantt parent tasks are expanded/collapsed by using expand/collapse icons, expand all/collapse all toolbar items and by using public methods. By default all tasks in Gantt was rendered in expanded state but we can change this status in Gantt.

Collapse all tasks at Gantt load

All tasks available in Gantt was rendered in collapsed state by setting CollapseAllParentTasks property as true. The following code example shows how to use this property.

@using Syncfusion.EJ2.Blazor.Gantt
<EjsGantt DataSource="@TaskCollection" CollapseAllParentTasks="true" Height="450px" Width="900px">
    <GanttTaskFields Id="TaskId" Name="TaskName" StartDate="StartDate" EndDate="EndDate"
             Duration="Duration" Progress="Progress" Child="SubTasks">
    </GanttTaskFields>
</EjsGantt>

@code{
    public List<TaskData> TaskCollection { get; set; }
    protected override void OnInitialized()
    {
        this.TaskCollection = GetTaskCollection();
    }

    public class TaskData
    {
        public int TaskId { get; set; }
        public string TaskName { get; set; }
        public DateTime StartDate { get; set; }
        public DateTime EndDate { get; set; }
        public string Duration { get; set; }
        public int Progress { get; set; }
        public List<TaskData> SubTasks { get; set; }
    }

    public static List<TaskData> GetTaskCollection()
    {
        List<TaskData> Tasks = new List<TaskData>() {
        new TaskData() {
            TaskId = 1,
            TaskName = "Project initiation",
            StartDate = new DateTime(2019, 04, 02),
            EndDate = new DateTime(2019, 04, 21),
            SubTasks = (new List <TaskData> () {
                new TaskData() {
                    TaskId = 2,
                    TaskName = "Identify Site location",
                    StartDate = new DateTime(2019, 04, 02),
                    Duration = "0",
                    Progress = 30,
                },
                new TaskData() {
                    TaskId = 3,
                    TaskName = "Perform soil test",
                    StartDate = new DateTime(2019, 04, 02),
                    Duration = "4",
                    Progress = 40,
                },
                new TaskData() {
                    TaskId = 4,
                    TaskName = "Soil test approval",
                    StartDate = new DateTime(2019, 04, 02),
                    Duration = "0",
                    Progress = 30
                },
            })
        },
        new TaskData() {
            TaskId = 5,
            TaskName = "Project estimation",
            StartDate = new DateTime(2019, 04, 02),
            EndDate = new DateTime(2019, 04, 21),
            SubTasks = (new List <TaskData> () {
                new TaskData() {
                    TaskId = 6,
                    TaskName = "Develop floor plan for estimation",
                    StartDate = new DateTime(2019, 04, 04),
                    Duration = "3",
                    Progress = 30,
                },
                new TaskData() {
                    TaskId = 7,
                    TaskName = "List materials",
                    StartDate = new DateTime(2019, 04, 04),
                    Duration = "3",
                    Progress = 40
                },
                new TaskData() {
                    TaskId = 8,
                    TaskName = "Estimation approval",
                    StartDate = new DateTime(2019, 04, 04),
                    Duration = "0",
                    Progress = 30,
                }
            })
        }
    };

        return Tasks;
    }
}

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Define expand/collapse status of tasks

In Gantt, we can render some tasks in collapsed state and some tasks in expanded state, this can done by defining expand status of the task in data source. This value was mapped to Gantt component by using ExpandState property. The following code example shows how to use this property.

@using Syncfusion.EJ2.Blazor.Gantt
<EjsGantt DataSource="@TaskCollection" Height="450px" Width="900px">
    <GanttTaskFields Id="TaskId" Name="TaskName" StartDate="StartDate" EndDate="EndDate"
            Duration="Duration" Progress="Progress" Child="SubTasks" ExpandState="isExpand">
    </GanttTaskFields>
</EjsGantt>

@code{
    public List<TaskData> TaskCollection { get; set; }
    protected override void OnInitialized()
    {
        this.TaskCollection = GetTaskCollection();
    }

    public class TaskData
    {
        public int TaskId { get; set; }
        public string TaskName { get; set; }
        public DateTime StartDate { get; set; }
        public DateTime EndDate { get; set; }
        public string Duration { get; set; }
        public int Progress { get; set; }
        public bool isExpand { get; set; }
        public List<TaskData> SubTasks { get; set; }
    }

    public static List <TaskData> GetTaskCollection() {
    List <TaskData> Tasks = new List <TaskData> () {
        new TaskData() {
            TaskId = 1,
            TaskName = "Project initiation",
            StartDate = new DateTime(2019, 04, 02),
            EndDate = new DateTime(2019, 04, 21),
            isExpand = true,
            SubTasks = (new List <TaskData> () {
                new TaskData() {
                    TaskId = 2,
                    TaskName = "Identify Site location",
                    StartDate = new DateTime(2019, 04, 02),
                    Duration = "3",
                    Progress = 50,
                },
                new TaskData() {
                    TaskId = 3,
                    TaskName = "Perform soil test",
                    StartDate = new DateTime(2019, 04, 02),
                    Duration = "3",
                    Progress = 50,
                },
                new TaskData() {
                    TaskId = 4,
                    TaskName = "Soil test approval",
                    StartDate = new DateTime(2019, 04, 02),
                    Duration = "3",
                    Progress = 50
                },
            })
        },
        new TaskData() {
            TaskId = 5,
            TaskName = "Project estimation",
            StartDate = new DateTime(2019, 04, 02),
            EndDate = new DateTime(2019, 04, 21),
            isExpand = false,
            SubTasks = (new List <TaskData> () {
                new TaskData() {
                    TaskId = 6,
                    TaskName = "Develop floor plan for estimation",
                    StartDate = new DateTime(2019, 04, 04),
                    Duration = "3",
                    Progress = 30,
                },
                new TaskData() {
                    TaskId = 7,
                    TaskName = "List materials",
                    StartDate = new DateTime(2019, 04, 04),
                    Duration = "3",
                    Progress = 40
                },
                new TaskData() {
                    TaskId = 8,
                    TaskName = "Estimation approval",
                    StartDate = new DateTime(2019, 04, 04),
                    Duration = "0",
                    Progress = 30,
                }
            })
        }
    };

    return Tasks;
}
}

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Customize expand/collapse action

On expand action Expanding and Expanded event will be triggered with current expanding row’s information. Similarly on collapse action Collapsing and Collapsed event will be triggered. Using this events and it’s arguments we can customize the expand/collapse action. The following code example shows how to prevent the particular row from expand/collapse action using Expanding and Collapsing event.

@using Syncfusion.EJ2.Blazor.Gantt
<EjsGantt DataSource="@TaskCollection" Height="450px" Width="900px">
    <GanttTaskFields Id="TaskId" Name="TaskName" StartDate="StartDate" EndDate="EndDate"
             Duration="Duration" Progress="Progress" Child="SubTasks">
    </GanttTaskFields>
    <GanttEvents Collapsing="Collapsing" Expanding="Expanding" TValue="TaskData"></GanttEvents>
</EjsGantt>

@code{
    public void Collapsing(ICollapsingEventArgs<TaskData> args)
    {
        if(args.Data.TaskData.TaskId == 1){
            args.Cancel = true;
        }
    }
    public void Expanding(ICollapsingEventArgs<TaskData> args)
    {
        if(args.Data.TaskData.TaskId == 5){
            args.Cancel = true;
        }
    }
    public List<TaskData> TaskCollection { get; set; }
    protected override void OnInitialized()
    {
        this.TaskCollection = GetTaskCollection();
    }

    public class TaskData
    {
        public int TaskId { get; set; }
        public string TaskName { get; set; }
        public DateTime StartDate { get; set; }
        public DateTime EndDate { get; set; }
        public string Duration { get; set; }
        public int Progress { get; set; }
        public List<TaskData> SubTasks { get; set; }
    }

    public static List<TaskData> GetTaskCollection()
    {
        List<TaskData> Tasks = new List<TaskData>() {
        new TaskData() {
            TaskId = 1,
            TaskName = "Project initiation",
            StartDate = new DateTime(2019, 04, 02),
            EndDate = new DateTime(2019, 04, 21),
            SubTasks = (new List <TaskData> () {
                new TaskData() {
                    TaskId = 2,
                    TaskName = "Identify Site location",
                    StartDate = new DateTime(2019, 04, 02),
                    Duration = "0",
                    Progress = 30,
                },
                new TaskData() {
                    TaskId = 3,
                    TaskName = "Perform soil test",
                    StartDate = new DateTime(2019, 04, 02),
                    Duration = "4",
                    Progress = 40,
                },
                new TaskData() {
                    TaskId = 4,
                    TaskName = "Soil test approval",
                    StartDate = new DateTime(2019, 04, 02),
                    Duration = "0",
                    Progress = 30
                },
            })
        },
        new TaskData() {
            TaskId = 5,
            TaskName = "Project estimation",
            StartDate = new DateTime(2019, 04, 02),
            EndDate = new DateTime(2019, 04, 21),
            SubTasks = (new List <TaskData> () {
                new TaskData() {
                    TaskId = 6,
                    TaskName = "Develop floor plan for estimation",
                    StartDate = new DateTime(2019, 04, 04),
                    Duration = "3",
                    Progress = 30,
                },
                new TaskData() {
                    TaskId = 7,
                    TaskName = "List materials",
                    StartDate = new DateTime(2019, 04, 04),
                    Duration = "3",
                    Progress = 40
                },
                new TaskData() {
                    TaskId = 8,
                    TaskName = "Estimation approval",
                    StartDate = new DateTime(2019, 04, 04),
                    Duration = "0",
                    Progress = 30,
                }
            })
        }
    };

        return Tasks;
    }
}