Hi Markov,

I’m deserializing a static json file using the below data structure, the gantt chart renders until it gets to a task that has planned dates and then it generates an exception. I’m using Smart.Blazor 20.0.4 and .NET 8

JSON:

[
{
"id": "66",
"label": "(Project-XXXXXX Customer) Description",
"dateStart": "2025-04-01",
"dateEnd": "2026-04-22",
"type": "task",
"progress": 0,
"synchronized": true,
"expanded": true,
"tasks": [
{
"id": "67",
"label": "Project Milestones",
"dateStart": "2025-04-01",
"dateEnd": "2026-02-26",
"type": "task",
"progress": 0,
"synchronized": true,
"expanded": true,
"tasks": [
{
"id": "68",
"label": "Customer Invoice/Payment Milestones",
"dateStart": "2025-04-01",
"dateEnd": "2025-04-01",
"type": "task",
"progress": 0,
"synchronized": true,
"expanded": true,
"tasks": [
{
"id": "69",
"label": "Purchase Order Receipt",
"dateStart": "2025-04-01",
"dateEnd": "2025-04-01",
"type": "milestone",
"progress": 0
"synchronized": true,
"expanded": true,
"tasks": [],
"connections": []
}
],
"connections": []
}
],
"connections": []
},
{
"id": "98",
"label": "(Phase-PRJ)Project",
"dateStart": "2025-04-01",
"dateEnd": "2026-02-26",
"type": "task",
"progress": 0,
"synchronized": true,
"expanded": true,
"tasks": [
{
"id": "99",
"label": "(Phase-DES) Design",
"dateStart": "2025-04-01",
"dateEnd": "2025-05-02",
"type": "task",
"progress": 0,
"synchronized": true,
"expanded": true,
"tasks": [
{
"id": "100",
"label": "Design Kick-off",
"dateStart": "2025-04-01",
"dateEnd": "2025-04-01",
"type": "milestone",
"progress": 0,
"synchronized": true,
"expanded": true,
"tasks": [],
"connections": []
},
{
"id": "102",
"label": "(Phase-MD) Mechanical Design",
"dateStart": "2025-04-09",
"dateEnd": "2025-04-29",
"planned": {
"dateStart": "2025-04-09",
"dateEnd": "2025-04-29"
},
"type": "task",
"progress": 0,
"synchronized": true,
"expanded": true,
"tasks": [
{
"id": "103",
"label": "Station XXXX",
"dateStart": "2025-04-09",
"dateEnd": "2025-04-22",
"type": "task",
"progress": 0,
"synchronized": true,
"expanded": true,
"tasks": [],
"connections": [
{
"target": 12,
"type": 0,
"lag": 14
}
]
},
{
"id": "104",
"label": "Station XXXY",
"dateStart": "2025-04-09",
"dateEnd": "2025-04-22",
"type": "task",
"progress": 0,
"synchronized": true,
"expanded": true,
"tasks": [],
"connections": [
{
"target": 13,
"type": 0,
"lag": 14
}
]
},
{
"id": "105",
"label": "Station XXXZ",
"dateStart": "2025-04-09",
"dateEnd": "2025-04-29",
"type": "task",
"progress": 0,
"synchronized": true,
"expanded": true,
"tasks": [],
"connections": [
{
"target": 14,
"type": 0,
"lag": 14
}
]
}
],
"connections": []
},
{
"id": "106",
"label": "(Phase-ED) Electrical Design",
"dateStart": "2025-04-23",
"dateEnd": "2026-05-02",
"type": "task",
"progress": 0,
"synchronized": true,
"expanded": true,
"tasks": [
{
"id": "107",
"label": "Station XXXX ED",
"dateStart": "2025-04-23",
"dateEnd": "2025-04-29",
"type": "task",
"progress": 0,
"synchronized": true,
"expanded": true,
"tasks": [],
"connections": []
},
{
"id": "108",
"label": "Station XXXY ED",
"dateStart": "2025-04-23",
"dateEnd": "2025-04-29",
"type": "task",
"progress": 0,
"synchronized": true,
"expanded": true,
"tasks": [],
"connections": []
},
{
"id": "109",
"label": "Station XXXZ ED",
"dateStart": "2025-04-23",
"dateEnd": "2025-05-02",
"type": "task",
"progress": 0,
"synchronized": true,
"expanded": true,
"tasks": [],
"connections": []
}
],
"connections": []
}
],
"connections": []
}
],
"connections": []
}
],
"connections": []
}
]

Data Structure:

public partial class GanttDataRecord
{
[JsonPropertyName("id")]
public string Id { get; set; }

[JsonPropertyName("label")]
public string Label { get; set; }

[JsonPropertyName("dateStart")]
public string DateStart { get; set; }

[JsonPropertyName("dateEnd")]
public string DateEnd { get; set; }

[JsonPropertyName("class")]
public string Class { get; set; }

[JsonPropertyName("type")]
public string Type { get; set; }

[JsonPropertyName("progress")]
public int Progress { get; set; }

[JsonPropertyName("duration")]
public int Duration { get; set; }

[JsonPropertyName("synchronized")]
public bool Synchronized { get; set; }

[JsonPropertyName("expanded")]
public bool Expanded { get; set; }

[JsonPropertyName("tasks")]
public List Tasks { get; set; }

[JsonPropertyName("disableResources")]
public bool DisableResources { get; set; }

[JsonPropertyName("planned")]
public object Planned { get; set; } = new object[] { };

[JsonPropertyName("deadline")]
public object Deadline { get; set; } = new object[] { };

[JsonPropertyName("indicators")]
public object Indicators { get; set; } = new object[] { };

[JsonPropertyName("segments")]
public object Segments { get; set; } = new object[] { };

[JsonPropertyName("resources")]
public object Resources { get; set; } = new object[] { };

[JsonPropertyName("connections")]
public List<Dictionary<string, int>> Connections { get; set; } = new List<Dictionary<string, int>>() { };

[JsonPropertyName("disableDrag")]
public bool DisableDrag { get; set; }

[JsonPropertyName("disableResize")]
public bool DisableResize { get; set; }

[JsonPropertyName("minDateStart")]
public string MinDateStart { get; set; }

[JsonPropertyName("maxDateStart")]
public string MaxDateStart { get; set; }

[JsonPropertyName("minDateEnd")]
public string MinDateEnd { get; set; }

[JsonPropertyName("maxDateEnd")]
public string MaxDateEnd { get; set; }

[JsonPropertyName("minDuration")]
public int MinDuration { get; set; }

[JsonPropertyName("maxDuration")]
public int MaxDuration { get; set; }

[JsonPropertyName("value")]
public int Value { get; set; }

[JsonPropertyName("dragProject")]
public bool DragProject { get; set; }
}

• This reply was modified 1 month, 2 weeks ago by dpcode. Reason: Add version

Thanks Markov,

Please keep me posted, I’m not certain when we need to demo possible solutions to management but I’d like to include this tool because I think it would be a good, competitive option if we can get it to work for our purposes.

Dave