用Razor模型数据填充javascript图表

我想用MVC6/Razor中的viewmodel中的数据填充一个折线图

我的模型是

public class LeaderboardViewModel
{
    public List<LeaderboardViewEntry> LeaderboardViewEntries { get; set; }
    public HistoicPointsViewModel HistoicPoints { get; set; } 
}

public class HistoicPointsViewModel
{
    public HistoicPointsViewModel()
    {
        PlayerHistores = new List<PlayerHistoricViewModel>();
    }

    public DateTime[] YAxisDates { get; set; }
    public List<PlayerHistoricViewModel> PlayerHistores { get; set; } 
}

public class PlayerHistoricViewModel
{
    public PlayerHistoricViewModel()
    {
        Points = new List<int?>();
    }

    public string PlayerName { get; set; }
    public List<int?> Points { get; set; }
}

---

您需要将模型列表编码为json。您可以使用razor中的json帮助器进行编码，请尝试以下操作：

var datelist = @Html.Raw(Json.Encode(Model.HistoicPoints.YAxisDates.Select(v => v.ToString("MMMM")));

TOSTRINGMMM将为您提供整个月份的名称

对玩家来说也是一样

var playerHistory = @Html.Raw(Json.Encode(Model.HistoicPoints.PlayerHistores.Select(v => new
{
    label = v.PlayerName,
    fillColor = String.Format("rgba({0},{1},{2},{3})", Color.Blue.R, Color.AliceBlue.G, Color.AliceBlue.B, Color.AliceBlue.A),
    strokeColor = String.Format("rgba({0},{1},{2},{3})", Color.Blue.R, Color.AliceBlue.G, Color.AliceBlue.B, Color.AliceBlue.A),
    pointColor = String.Format("rgba({0},{1},{2},{3})", Color.Blue.R, Color.AliceBlue.G, Color.AliceBlue.B, Color.AliceBlue.A),
    pointStrokeColor = "#fff",
    pointHighlightFill = "#fff",
    pointHighlightStroke = "rgba(220,220,220,1)",
    data = v.Points
})));

如果您想使用颜色类或只是将rgba设置为字符串，我已经使用颜色类创建了颜色

基本上，您可以在javascript代码中实现这一点

var data = {
    labels: '@datelist',
    datasets: '@playerHistory'
};

---

我认为最简单的方法是创建相应的ChartModel，将其序列化为您需要的确切JSON结构：

public class DtatsetModel
{
    public string label {get;set;}
    public const string fillColor = "rgba(220,220,220,0.2)";
    public const string strokeColor = "rgba(220,220,220,1)";
    public const string pointColor = "rgba(220,220,220,1)";
    public const string pointStrokeColor = "#fff";
    public const string pointHighlightFill = "#fff";
    public const string pointHighlightStroke = "rgba(151,187,205,1)";
    public List<string> data {get;set;}

    public DtatsetModel(PlayerHistoricViewModel x)
    {
        this.label = x.PlayerName;
        this.data =  x.Points.Where(p=>p.HasValue).Select(p=>p.ToString());
    }
}

public class ChartModel
{
   public List<string> labels {get;set;}
   public List<DtatsetModel> datasets {get;set;}

   public ChartModel(HistoicPointsViewModel x)
   {
      this.labels = x.Select(d=>d.ToString("MMMM"));
      this.datasets = x.PlayerHistores.Select(h=>new DtatsetModel(h));
   }
}

然后在视图中，您可以执行以下操作

<script type="text/javascript">
    var data = @Html.Raw(JsonConvert.SerializeObject(new ChartModel(Model.HistoicPoints)))
    var ctx = document.getElementById("myChart").getContext("2d");
    var myNewChart = new Chart(ctx).Line(data);
</script>

---

对于序列化，我使用了

首先，我建议不要混合使用javascript和razor，因为内联javascript很容易用于XSS

我将使用razor中创建的一些不可见元素上的数据属性，然后从javascript中读取这些数据属性

因此，只需使用数据属性创建div

---

通过这种方式，您将javascript与razor解耦

如果这是asp.net MVC 6，为什么会有asp.net MVC 4标记？顺便问一下，您的视图中的模型是什么？@ataravati抱歉清理了它，将Viewmodel添加到视图中，并将Viewmodel添加到类中使用内联javascript有多个缺点，但是内联javascript容易出现在XSS中-您是如何得出这个结论的？如果您允许内联javascript，那么您就容易出现XSS。如果您使用的CSP不允许任何内联javascript，那么您就可以防止您的站点受到相当大范围的攻击。将不执行内联javascript节

public class DtatsetModel
{
    public string label {get;set;}
    public const string fillColor = "rgba(220,220,220,0.2)";
    public const string strokeColor = "rgba(220,220,220,1)";
    public const string pointColor = "rgba(220,220,220,1)";
    public const string pointStrokeColor = "#fff";
    public const string pointHighlightFill = "#fff";
    public const string pointHighlightStroke = "rgba(151,187,205,1)";
    public List<string> data {get;set;}

    public DtatsetModel(PlayerHistoricViewModel x)
    {
        this.label = x.PlayerName;
        this.data =  x.Points.Where(p=>p.HasValue).Select(p=>p.ToString());
    }
}

public class ChartModel
{
   public List<string> labels {get;set;}
   public List<DtatsetModel> datasets {get;set;}

   public ChartModel(HistoicPointsViewModel x)
   {
      this.labels = x.Select(d=>d.ToString("MMMM"));
      this.datasets = x.PlayerHistores.Select(h=>new DtatsetModel(h));
   }
}

<script type="text/javascript">
    var data = @Html.Raw(JsonConvert.SerializeObject(new ChartModel(Model.HistoicPoints)))
    var ctx = document.getElementById("myChart").getContext("2d");
    var myNewChart = new Chart(ctx).Line(data);
</script>

            @foreach (PlayerHistoricViewModel x in Model.HistoicPoints.PlayerHistores)
            {
                <div
                    class="players"
                    data-label= "x.PlayerName",
                    data-fillColor= "rgba(220,220,220,0.2)",
                    data-strokeColor= "rgba(220,220,220,1)",
                    data-pointColor= "rgba(220,220,220,1)",
                    data-pointStrokeColor= "#fff",
                    data-pointHighlightFill= "#fff",
                    data-pointHighlightStroke= "rgba(220,220,220,1)",
                    data-points= "x.Points"//this will maybe need some work to make json array
                />
            }

var datasets = [];
$("div.players").each(function(){
    var testdata = {
              label = $(this).data('label');
              fillColor = $(this).data('label');
              ...
              points = $(this).data('points');
              //if datapoints will be json array then it will be automatically parsed as such
     }

    datasets.push(testdata);
});