How to call postback using javascript on ASP.NET form

I have a web form with textbox and button. I want after “ENTER” key click on textbox postbak form.

I am using next code:

onkeypress=" if(event.keyCode==13)
 { alert(2);
WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions('ctl00$ContentPlaceHolder1$btnSearch', '', true, '', '', false, false));
alert(2); 
return false;}

where WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions('ctl00$ContentPlaceHolder1$btnSearch', '', true, '', '', false, false));

is javascript code for button event onclick.

I get two alerts, but postback doesnot happen.

Any ideas what is wrong?

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Answers:

Method 1

Method 2

Answers:

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Method 1

ASP.NET already creates a client side javascript method __doPostBack to support postback.

Example: __doPostBack('__Page', 'MyCustomArgument');

Method 2

Easier way of doing it is to enclose the controls in a panel and use defaultbutton attribute on the panel, like this:

<asp:Panel ID="pan1" runat="server" DefaultButton="btnSave">
    <asp:TextBox ID="txt1" runat="server" />
    <asp:Button ID="btnSave" runat="server" />
</asp:Panel>

Then when you press ‘enter’ after entering the value in the text box it will behave as if you clicked on the btnSave button.

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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