Question

我不确定这是否可行但是，我有一个复杂类型的字典，我想将它绑定到RadioButtonList / CheckBoxList控件：

public class ComplexType
{
   public String Name { get; set; }
   public String FormattedName { get; set; }
   public String Description { get; set; }
}
var listOfMyTypes = new Dictionary<int, ComplexType>();

var myType = new ComplexType { Name = "Name", Description = "Description", FormattedName = "Name|Description" };
var myType1 = new ComplexType { Name = "Name2", Description = "Description2", FormattedName = "Name|Description2" };


listOfMyTypes.Add(1, myType);
listOfMyTypes.Add(2, myType1);

m_dropDownlist.DataTextField = "Value"; //What do I put here to render "Name"
m_dropDownlist.DataValueField = "Key";
m_dropDownlist.DataSource = listOfMyTypes;
m_dropDownlist.DataBind();

Answer 1

将TextField设置为要显示的属性。您将ValueField设置为要发布的属性。最后，绑定到Dictionary的值。我正在寻找DropDownList的“模板”版本，但没有找到。所以，如果你需要Dictonary的Key，你可能必须这么做 - 循环/添加。

m_dropDownlist.DataTextField = "FormattedName"; //What do I put here to render "Name" 
m_dropDownlist.DataValueField = "Name"; 
m_dropDownlist.DataSource = listOfMyTypes.Values; 
m_dropDownlist.DataBind();

我确实找到了另一种方式。您可以在类中覆盖“ToString（）”：

public class ComplexType      
{      
   public String Name { get; set; }      
   public String FormattedName { get; set; }      
   public String Description { get; set; } 
   public override string ToString()
   {
      return this.Name;
   }     
}

然后正常绑定：

m_dropDownlist.DataTextField = "Value"; //What do I put here to render "Name" 
m_dropDownlist.DataValueField = "Key"; 
m_dropDownlist.DataSource = listOfMyTypes; 
m_dropDownlist.DataBind();

Answer 2

尝试绑定到Dictionary.Values，而不是这样：

m_dropDownlist.DataTextField = "Name"
m_dropDownlist.DataValueField = "Description";
m_dropDownlist.DataSource = listOfMyTypes.Values;
m_dropDownlist.DataBind();

Answer 3

你可以写

m_dropDownlist.DataTextField = "Value.Name";

将复杂类型的字典绑定到RadioButtonList

3 个答案: