在mvc中动态创建控件

debugcn 发表于 Dev

Rutu

我想根据源动态地在视图中创建控件，如果type = text box，则创建文本框；如果是，则在MVC中动态创建复选框。下面是我当前的代码

     @model PayTxn.Miscellaneous.Models.SurveyViewModel
        @using PayTxn.Miscellaneous.Models
 @{ int index = 0;}

            @for (int i = 0; i < Model.ControlsList.Length; i++)
            {

                var control = Model.ControlsList[i];

                if (control.Type == "radio")
                {

                    Html.RenderPartial("~/Views/Shared/EditorTemplates/_RadioBoxViewModel.cshtml", control as RadioBoxViewModel, new ViewDataDictionary { { "index", index } });

                }
                else if (control.Type == "checkbox")
                {
                    Html.RenderPartial("~/Views/Shared/EditorTemplates/_CheckBoxViewModel.cshtml", control as CheckBoxViewModel, new ViewDataDictionary { { "index", index } });
                }
                else if (control.Type == "textbox")
                {
                    Html.RenderPartial("~/Views/Shared/EditorTemplates/_TextBoxViewModel.cshtml", control as TextBoxViewModel, new ViewDataDictionary { { "index", index } });
                }
                else if (control.Type == "rattingbox")
                {
                    Html.RenderPartial("~/Views/Shared/EditorTemplates/_RattingBoxViewModel.cshtml", control as RattingBoxViewModel, new ViewDataDictionary { { "index", index } });
                }
                else if (control.Type == "slider")
                {
                    Html.RenderPartial("~/Views/Shared/EditorTemplates/_SliderViewModel.cshtml", control as SliderViewModel, new ViewDataDictionary { { "index", index } });
                }
                index = index + 1;
            }
    <input type="submit" name="action:Submit1" value="Submit1" />
            <input type="submit" name="action:Reset" value="Reset" />

它工作正常，但在单击Submit1按钮时，我的视图未与模型紧密绑定模型代码为

  public class SurveyViewModel
{
    //public List<ControlViewModel> ControlsList { get; set; 
    public ControlViewModel[] ControlsList { get; set; }
}
public abstract class ControlViewModel
{
    public abstract string Type { get; }
    public bool Visible { get; set; }
    public string Label { get; set; }
    public string Name { get; set; }
}

public class TextBoxViewModel : ControlViewModel
{
    public override string Type
    {
        get { return "textbox"; }
    }
    public string Value { get; set; }
}

public class RadioBoxViewModel : ControlViewModel
{
    public List<string> Options { get; set; }
    public List<string> Values { get; set; }
    public override string Type
    {
        get { return "radio"; }
    }
}

public class CheckBoxViewModel : ControlViewModel
{
    public List<string> Options { get; set; }
    public List<string> Values { get; set; }
    public override string Type
    {
        get { return "checkbox"; }
    }
    public bool Value { get; set; }
}
public class SliderViewModel : ControlViewModel
{
    public override string Type
    {
        get { return "slider"; }
    }
    public string Value { get; set; }
}
public class RattingBoxViewModel : ControlViewModel
{
    public List<string> Titles { get; set; }
    public List<string> Rattings { get; set; }
    public string _rattingType = null;
    public string RattingType
    {
        get
        {
            if (string.IsNullOrEmpty(_rattingType))
                return "star";
            else
                return _rattingType;
        }

        set
        {
            _rattingType = value;
        }
    }
    public override string Type
    {
        get { return "rattingbox"; }
    }
    public bool Value { get; set; }
}

Rutu

嘿，我通过创建自定义模型联编程序解决了此问题，这是代码

    public class ControlModelBinder : DefaultModelBinder
     {
    protected override object CreateModel(ControllerContext controllerContext,             ModelBindingContext bindingContext, Type modelType)
    {
        var datalist = controllerContext.HttpContext.Request.Form.GetEnumerator();
        SurveyViewModel model = new SurveyViewModel();
        model.ControlsList = new List<ControlViewModel>();
        List<string> answers = new List<string>();
        while (datalist.MoveNext())
        {
            string currentKey = datalist.Current.ToString();
            if (currentKey.Contains("TextBoxViewModel"))
            {
                TextBoxViewModel textBoxViewModel = new TextBoxViewModel();
                textBoxViewModel.Value = controllerContext.HttpContext.Request.Form[currentKey];
                model.ControlsList.Add(textBoxViewModel);
            }
            else if (currentKey.Contains("CheckBoxViewModel"))
            {
                CheckBoxViewModel checkboxviewmodel = new CheckBoxViewModel();
                checkboxviewmodel.SelectedValues = controllerContext.HttpContext.Request.Form[currentKey];
                model.ControlsList.Add(checkboxviewmodel);
            }
            else if (currentKey.Contains("RadioBoxViewModel"))
            {
                RadioBoxViewModel radioboxviewmodel = new RadioBoxViewModel();
                radioboxviewmodel.SelectedValue = controllerContext.HttpContext.Request.Form[currentKey];
                model.ControlsList.Add(radioboxviewmodel);
            }
            else if (currentKey.Contains("RattingBoxViewModel"))
            {
                RattingBoxViewModel rattingboxviewmodel = new RattingBoxViewModel();
                rattingboxviewmodel.Score = controllerContext.HttpContext.Request.Form[currentKey];
                model.ControlsList.Add(rattingboxviewmodel);
            }
            else if (currentKey.Contains("SliderViewModel"))
            {
                SliderViewModel sliderviewmodel = new SliderViewModel();
                sliderviewmodel.Value = controllerContext.HttpContext.Request.Form[currentKey];
                model.ControlsList.Add(sliderviewmodel);
            }
        }
        return model;
    }

}

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