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Two-way data binding in ASP.NET

Say we have an object

class Entity
{
    public string ID {get; set;}
    public string Name {get; set;}
}

I want to bind properties to two text fields on a page like this:

<asp:FormView ID="FormView" runat="server">
  <ItemTemplate>
    <asp:textbox ID="TextId" Text='<%# Bind("ID") %>'/>
    <asp:textbox ID="TextId" Text='<%# Bind("Name") %>'/>
  </ItemTemplate>
</asp:FormView>

and then write this in code for

public EntityObject
        {
            get { return ViewState["Entity"] as Entity; }
            set { ViewState["Entity"] = value; }
        }
protected override void OnInit(EventArgs e)
        {
            if (EntityObject== null)
                EntityObject= new EntityObject();

            FormView.DataSource = new[] { EntityObject };
            FormView.DataBind();
            base.OnInit(e);
        }

And when I enter the values ​​in the text fields, I expect EntityObject to have these values ​​in the properties when the page reloads after PostBack, but the properties are always zero. Please help, where am I mistaken?

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5 answers

, , aps.net .net... - " " ( AddIncomeSources - RepeaterControl)

        public List<Income> AdditionalIncomeList 
        {
            get { return ViewState["AdditionalIncome"] as List<Income>; }
            set { ViewState["AdditionalIncome"] = value; }
        }                
            foreach (RepeaterItem item in AddIncomeSources.Items)
            {
                var amount = (TextBox)item.Controls.Cast<Control>().First(c => c.ID == "Amount");
                var document = (DropDownList)item.Controls.Cast<Control>().First(c => c.ID == "Document");
                AdditionalIncomeList[item.ItemIndex].Amount = amount.Text.ToDouble();
                AdditionalIncomeList[item.ItemIndex].IncomeDocument = document.SelectedValue;
            }
            AddIncomeSources.DataSource = AdditionalIncomeList;
            AddIncomeSources.DataBind();
+4

OnInit .. .

.

Page_Load() {

if(!Page.IsPostBack)
{
     if (EntityObject== null) 
            EntityObject= new EntityObject(); 

        FormView.DataSource = new[] { EntityObject }; 
        FormView.DataBind(); 
 }

}

0

, .

gridview .aspx , viewstate .

, , ViewState Session Application. , ( ). .NET ViewState.

0

, , javascript-. , WPF . .txt

https://github.com/jdemeuse1204/ObjectDataBinding

,

<input runat="server" class="popoutEditInput" style="width: 50px;" data-bind="path: Quote" />


$("#yourelementname").observe(yourobject, 'yourbindingname');


var object = $("#yourelementname").getObserveObject('yourbindingname');
0

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