ASP.Net Model binding - WebForms

问题

I have been asked to work on an ASP.Net WebForms project and I want to use ModelBinding like I do in ASP.Net MVC.

I am having some problems in getting this to work and would like some help if possible.

If I want to bind a model to objects on a Form I need to do this in a FormView, GridView and so on but in this instance I want to use a FormView.

The below code is a simplified version of what I am working with but everybit relevant.

<asp:FormView runat="server" ID="frmMain" ItemType="WebFormsModelBinding.TestModel" SelectMethod="TestBinding_select" >
    <ItemTemplate>
        <asp:TextBox runat="server" ID="txtName" Text="<%#: BindItem.Name %>" />
        <br/>
        <asp:TextBox runat="server" id="txtAge" Text=" <%#: BindItem.Age %>" />

    </ItemTemplate>

</asp:FormView>
<asp:Button runat="server" id="bttnInsert" Text="button"/>

I have a JQuery script that is attempting to pass the data back to the model but I keep getting a Internal 500 Error

$(document).ready(function() {

        $("#MainContent_bttnInsert")
            .click(function() {


                var params = {
                    Name: "Dave",
                    Age: 55
                }

                $.ajax({
                    type: "POST",
                    url: "default.aspx/TestBinding",
                    data: JSON.stringify(params),
                    contentType: "application/json; charset=utf-8",
                    dataType: "json",
                    //success: function (data) {
                    success: function () {
                        alert("it worked");
                        return false;

                    },
                    error: function (data) {

                        console.log(data); 
                        alert("didnt work");
                    }
                });
                return false;
            });
    })

This should hit this code in the default page

    public partial class _Default : Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    [System.Web.Services.WebMethod]
    public static bool TestBinding(TestModel model)
    {

        return true;
    }

    public TestModel TestBinding_select()
    {
        var model = new TestModel
        {
            Name = "Simon",
            Age = 33
        };

        return model;
    }
}

public class TestModel
{
    public string Name { get; set; }
    public int Age { get; set; }

}

The problems I am having is that as I cant use an ActionResult I have to declare a different object type as the return type. For this example I have chosen a bool and there is no specific reason for this.

In order to hit a WebMethod I have to make the method static.

The error that I am getting is

"Invalid web service call, missing value for parameter: 'model'."

So, I can pass a model to the UI and present it in the FormView in this instance, but I cannot pass a model back via JQuery or a postback.

Is there anything that I am missing, or do I really have to pass each variable back and then pass the values to the class thus making model binding almost pointless in WebForms

回答1:

If you ware going to work with WebForms, you should get used to working with the PostBack model, or you're going to be constanty fighting against the selected framework.

But for the question at hand, try the following:

data: JSON.stringify({'model':params})

来源：https://stackoverflow.com/questions/41891573/asp-net-model-binding-webforms

标签

ASP.NET

webforms

model-binding