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How can we submit from without a submit button?

Posted By :Jack Smith     Posted Date :September 19, 2012    Points :40   Category :JavaScript/VBScript 
We can use a simple JavaScript code linked to an event trigger of any form field.In the JavaScript code, we can call the document.form.submit() function to submitthe form. For example

You can also find related Interview Question to How can we submit from without a submit button?  below: 

In the page load event I assigned DropDownList's DataSource property to a valid list. On the submit button click.. the same DataSource property is coming as null. Why?

As ViewState is not storing the DataSource property.

We have to use Items property of DropDownList to get the items back. (More...)

You are working on an ASP.NET application. One of the drop down list contans 1 lakh records. The page posting becomes very slow. How to overcome this? You just need the selected index of the dropdownlist on submit.

Use EnableVieState=false. On the dropdown change event, set a hidden field value to the selected index.

Disabling view state helps us in reducing the postback load. (More...)

How to clear a datagrid on a button click?

You need to Clear the DataSource of the dadaGrid.
So try this: dataSet1.Clear();
dataGrid1.DataSource = dataSet1.TableNameHere.DefaultView;
C#: dataGrid1.DataSource = null;
VB: dataGrid1.DataSource = nothing (More...)

Suppose you want a certain ASP.NET function executed on MouseOver for a certain button. Where do you add an event handler?

Add an OnMouseOver attribute to the button. Example: btnSubmit.Attributes.Add("onmouseover","someClientCodeHere();"); (More...)

How to define a button USING XAML?

To define a button in WPD using XAML use the following syntax,


Here the

Is it possible make a call to server side event of any button using javascript?

Yes, it's possible. You can use __doPostBack() function to call server side event.

How to Change the BackGround Color of a Button dynamically in WPF?

System.Windows.Controls.Button b = new System.Windows.Controls.Button();

b.Content = "OK";

b.Background = System.Windows.Media.Brushes.Red;

How To Close Browser Window With Button Click?

btnClose.Attributes.Add("OnClick", "window.close();");


How To Allow Only One Button Click In Long Time Operations?

page load event .......
btnOnlyOnce.OnClientClick = @"if(this.value == 'Please wait...')
return false;
this.value = 'Please wait...';";

button click event
btnOnlyOnce.Text = "Long operation is finished";

How to define a button USING XAML?

To define a button in WPF using XAML, Syntax is given below-


Here the

How do you check or uncheck a checkbox input or radio button using JQuery?

There are two ways to check or uncheck a checkbox or radio button.
Set the 'checked' attribute to true or false.
// Check #TagId
$('#TagId').attr('checked', true);
// Uncheck #TagId
$('#TagId').attr('checked', false);
Add or remove the 'checked' attribute:
// Check #TagId
$("#TagId").attr('checked', 'checked');
// Uncheck #TagId
$("#TagId").removeAttr('checked'); (More...)

How can we auto size a button to fit its text?

The Button control has the AutoSize property, which can be set to true or false. If we set the value of the AutoSize property to true, then the button control automatically alters its size according to the content displayed on it. (More...)

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