ASP.NET Best way to keep label.text between postback using PageMethods

Question

ASP.NET 2.0, PageMethods.

Good day,

I am using ASP.NET AJAX PageMethods to dynamically change the label text when the list is modified on my page.

I know that label text is not saved between postbacks when they change on the client side, which is my business. I heard that the solution is to save the contents of the labels in a hidden field, and then set the label text from this field to Page_Load.

However, this solution seems to me not very clean. Are there other alternatives or best practices?

Thanks!

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Just to clarify, I have a drop-down list with the names of people. When the drop-down list changes, I want to put the phone number of this person on the label. However, I thought full relaying wasn’t the best alternative, so I decided to get the phone using PageMethod, passing the identifier of the item selected in the drop-down list to get the phone and putting it on the shortcut.

However, since other controls cause a full postback, I lose my phone every time I postback. I know that I put it in a hidden field, and then set it back to the label in Page_Load when full feedback will be executed, but I was a word if there was another solution. Since WebMethods are marked as static, I cannot write Label.text = person.Telephone; in them.

Answer 1

, , ajax, , , page_load .

DropDownList:

string phone = <.. get phone number ...>;
myLabel.Text = phone;
ViewState["currentPhone"] = phone;

PageLoad:

myLabel.Text = (ViewState["currentPhone"] != null) ? (string)ViewState["currentPhone"] : string.Empty;

Ajax, HiddenInputField aspx , javascript . aspx:

<asp:HiddenInputField runat="server" ID="myHiddenInput" />

PageLoad:

myLabel.Text = myHiddenInput.Value;

Answer 2

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Answer 3

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Answer 4

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