Question

我还尝试了以下代码......使用处理程序

在Index.aspx

中

<ext:Store ID="Store1" IsPagingStore="true" runat="server">

             <Proxy>
                        <ext:AjaxProxy Url="../../Shared/JsonHandler.ashx">
                            <ActionMethods Read="GET" />
                            <Reader>

                                <ext:JsonReader Root="names" />
                            </Reader>
                        </ext:AjaxProxy>
                    </Proxy>
           <Model>
            <ext:Model ID="Model1" runat="server">
            <Fields>
            <ext:ModelField Name="name" Type="String" Mapping="nameList"  />

            </Fields>
            </ext:Model>
             </Model>
            </ext:Store>
            </Store>

在JsonHandler.ashx

中

 public void ProcessRequest(HttpContext context)
    {
        context.Response.ContentType ="text/json";
        var requestParams = new StoreRequestParameters(context);

        FormExampleController ex=new FormExampleController ();

        var list = ex.getValue();

        context.Response.Write(string.Format("{{'Names':{0}}}",JSON.Serialize(list)));


    }

在FormController中

public List<string> getValue()
    {
        FormUser user = new FormUser();
        user.nameList = new List<string>
        {
            "A",
            "B",
            "C",
            "D"

        };
        return user.nameList;
    }

这里的值再次传递给处理程序，但组合框显示为空!!有什么建议吗？

Answer 1

似乎无法将Store绑定到简单的List或Array字符串。

以下是应该有效的测试用例，但没有。我正在研究解决方案，很快就会发布更新。

示例

<%@ Page Language="C#" %> <script runat="server"> protected void Page_Load(object sender, EventArgs e) { var store = this.ComboBox1.GetStore(); store.DataSource = new List<string> { "A", "B", "C", "D" }; store.DataBind(); } </script> <!DOCTYPE html> <html> <head runat="server"> <title>Ext.NET Example</title> </head> <body> <form runat="server"> <ext:ResourceManager runat="server" /> <ext:ComboBox ID="ComboBox1" runat="server" DisplayField="name"> <Store> <ext:Store runat="server"> <Model> <ext:Model runat="server"> <Fields> <ext:ModelField Name="name" /> </Fields> </ext:Model> </Model> </ext:Store> </Store> </ext:ComboBox> </form> </body> </html>

以下示例绑定到一个简单的List<object>，虽然显然这不是原始问题的解决方案，但我在此处作为可能的临时解决方法。

示例

<%@ Page Language="C#" %> <script runat="server"> protected void Page_Load(object sender, EventArgs e) { var store = this.ComboBox1.GetStore(); store.DataSource = new List<object> { new { name = "A" }, new { name = "B" }, new { name = "C" }, new { name = "D" } }; store.DataBind(); } </script> <!DOCTYPE html> <html> <head runat="server"> <title>Ext.NET Example</title> </head> <body> <form runat="server"> <ext:ResourceManager runat="server" /> <ext:ComboBox ID="ComboBox1" runat="server" DisplayField="name"> <Store> <ext:Store runat="server"> <Model> <ext:Model runat="server"> <Fields> <ext:ModelField Name="name" /> </Fields> </ext:Model> </Model> </ext:Store> </Store> </ext:ComboBox> </form> </body> </html>

Answer 2

是的，Store不支持这种简单的结构。存储期望对象的集合（对象应包含在模型中定义为字段的属性）

您应该将您的字符串列表转换为对象列表，例如

(new List<string>{"a", "b", "s"}).Select(s => new {FieldName = s})

ext.net combobox无法从数据库加载数据

2 个答案: