这是控件构建器类...
public class ControlBuilder
{
/// <summary>
/// Html Control class for controlbuilder Control .
/// </summary>
protected HTMLControl formControl;
/// <summary>
/// Html Control class for the label.
/// </summary>
private HTMLControl labelControl;
/// <summary>
/// Getting the property for the Control .
/// </summary>
/// <history>
/// [LuckyR] 10/8/2009 Created
/// </history>
public HTMLControl Form
{
get { return formControl; }
}
/// <summary>
/// Creating a label for the Control.
/// </summary>
/// <history>
/// [LuckyR] 10/8/2009 Created
/// </history>
public HTMLControl Label
{
get { return labelControl; }
}
/// <summary>
/// Creating a construtor for the controlbuilder taking in Zero
/// arguments it creates a labl for the Control .
/// </summary>
/// <history>
/// [LuckyR] 13/8/2009 Created
/// </history>
public ControlBuilder() { }
/// <summary>
/// A construtor for the controlbuilder which
/// creates a label for the Control .
/// </summary>
/// <history>
/// [LuckyR] 10/8/2009 Created
/// </history>
public ControlBuilder(string labelName)
{
Label label = new Label();
label.Text = labelName;
label.Width= 200;
labelControl = new HTMLControl(label);
}
/// <summary>
/// Control build property that is used to biuld the Html
/// markup for the created Control.
/// </summary>
/// <history>
/// [LuckyR] 10/8/2009 Created
/// </history>
public string BuildControl()
{
this.CreateControl();
this.SetAttribute();
return this.RenderHTML();
}
/// <summary>
/// Render Html tags for the Control with label .
/// </summary>
/// <history>
/// [LuckyR] 10/8/2009 Created
/// </history>
public string RenderHTML()
{
return labelControl.RenderHTML() + ": " + formControl.RenderHTML();
}
/// <summary>
/// Used to Set Attributes for the Control .
/// </summary>
/// <history>
/// [LuckyR] 13/8/2009 Created
/// </history>
protected virtual void SetAttribute() { }
/// <summary>
/// Used to create the Control .
/// </summary>
/// <history>
/// [LuckyR] 13/8/2009 Created
/// </history>
protected virtual void CreateControl() { }
/// <summary>
/// A list of all the Controls that will be created during the
/// program run .
/// </summary>
private IList<ControlBuilder> Controls = new List<ControlBuilder>();
/// <summary>
/// A property to add Control to the ControlBuilder that are created by
/// the user.
/// </summary>
/// <history>
/// [LuckyR] 13/8/2009 Created
/// </history>
/// <param name="Control">Controls from the controlbuilder class</param>
public void AddControl(ControlBuilder Control)
{
Controls.Add(Control);
}
/// <summary>
/// A property to display the Controls that are created by
/// the user.
/// </summary>
/// <history>
/// [LuckyR] 13/8/2009 Created
/// </history>
public string Display()
{
string Html = string.Empty;
foreach (ControlBuilder builder in Controls)
{
Html += builder.BuildControl();
Html += "<br /><br />";
}
return Html;
}
}
}
这就是我构建控件的方式
public class TextBoxBuilder : ControlBuilder
{
/// <summary>
/// Creating a web Control textBox.
/// </summary>
private TextBox textBox;
/// <summary>
/// Creating an Id to add as an attribute .
/// </summary>
private string Id;
/// <summary>
/// Creating an Value to add as an attribute .
/// </summary>
private string Value;
/// <summary>
/// Creating a Textbox constructor which takes in LabelName and Id.
/// to create a label for the Control.
/// </summary>
/// <history>
/// [LuckyR] 10/8/2009 Created
/// </history>
public TextBoxBuilder(string labelName, string id , string value): base(labelName)
{
this.Id = id;
this.textBox = new TextBox();
this.Value = value;
}
/// <summary>
/// Used to Set properties for the Control .
/// </summary>
/// <history>
/// [LuckyR] 10/8/2009 Created
/// </history>
protected override void SetAttribute()
{
this.textBox.ID = this.Id;
this.textBox.Text = this.Value;
}
/// <summary>
/// Used to create the Control . That is done by calling the HtmlControl class
/// which inturn renders the particular Control for us .
/// </summary>
/// <history>
/// [LuckyR] 10/8/2009 Created
/// </history>
protected override void CreateControl()
{
this.formControl = new HTMLControl(this.textBox);
}
}
}
在我的家庭控制器中，我这样做了......
public ActionResult Create()
{
///Where i am contacting the linq to sql classs for performing ths operagtion
foreach (var control in Rep.GetData(ScreenName))
{
string Type = control.Type;
string value = null;
if (id != Guid.Empty)
{
value = DataObj.GetValue(control.TableName, control.ControlName, id);
}
switch (Type)
{
case ("TextBox"):
/// Buliding a textBox box
controlbuilder.AddControl(new TextBoxBuilder(control.Field, control.ControlName, value));
break;
case ("CheckBox"):
/// Bulidig a CheckBox .
controlbuilder.AddControl(new CheckBoxBuilder(control.Field, control.ControlName , value));
break;
case ("DatePicker"):
/// Bulidig a DatePicker .
controlbuilder.AddControl(new DatePicker(control.Field, control.ControlName, value));
break;
case ("DropDownList"):
///Building a dropdownlist.
List<string> list = DataObj.GetDropDownValues(control.Id);
controlbuilder.AddControl(new DropDownListBuilder(control.Field, control.ControlName, list,value));
break;
case ("TextArea"):
/// Building a textBox area .
controlbuilder.AddControl(new TextArea(control.Field, control.ControlName , value));
break;
default:
break;
}
}
return View(controlbuilder);
}
视图页面看起来像这样......
<% using (Html.BeginForm())
{%>
<fieldset>
<legend>Fields</legend>
<p>
<%= ViewData.Model.Display() %>
</p>
<p>
<input type="submit" value="Create" />
</p>
</fieldset>
<% } %>
<div>
<%=Html.ActionLink("Back to List", "Index")%>
</div>
因为我将我的班级传递到视图中，所以可以使用.display检索所有数据。
答案 0 :(得分：6)
ASP.NET MVC中没有控件的概念。
您有两种选择：
当用户单击按钮时，您在控制器操作中处理此POST请求，在视图模型中设置某种标记以显示文本框，然后返回相同的视图，该视图将依次显示标志并根据需要生成文本框。这将导致完整的往返，这有点类似于WebForms中的回发。
您使用JavaScript就地执行此操作。您可以截取按钮上的单击事件，并将输入/ textarea HTML元素注入到文档结构中。