How does jqery obtain the values and IDs of the single and check drop-down lists?

 

Obtain select:

Obtain the selected text in the SELECT statement:

$ ("# Ddlregtype"). Find ("option: Selected"). Text ();

 

Obtain the value selected by the SELECT statement:

$ ("# Ddlregtype"). Val ();

 

Obtain the index selected by the SELECT statement:

$ ("# Ddlregtype"). Get (0). selectedindex;

 

Set select:

Set the index selected by select:

$ ("# Ddlregtype"). Get (0). selectedindex = index; // index indicates the index value.

 

Set the value selected by select:

$ ("# Ddlregtype"). ATTR ("value", "normal");

$ ("# Ddlregtype"). Val ("normal ");

$ ("# Ddlregtype"). Get (0). value = value;

 

Set select selected text:

VaR COUNT = $ ("# ddlregtype option"). length;

For (VAR I = 0; I <count; I ++)
{If ($ ("# ddlregtype"). Get (0). Options [I]. Text = text)
{
$ ("# Ddlregtype"). Get (0). Options [I]. Selected = true;

Break;
}
}

 

$ ("# Select_id option [TEXT = 'jquery ']"). ATTR ("selected", true );

 

Set select option items:

 

$ ("# Select_id"). append ("<option value = 'value'> text </option>"); // Add an option

$ ("# Select_id"). prepend ("<option value = '0'> select </option>"); // insert an option

$ ("# Select_id option: Last"). Remove (); // Delete the option with the largest index value

$ ("# Select_id option [Index = '0']"). Remove (); // delete an option with an index value of 0

$ ("# Select_id option [value = '3']"). Remove (); // delete an option with a value of 3

$ ("# Select_id option [TEXT = '4']"). Remove (); // delete an option with a text value of 4

 

Clear select:

$ ("# Ddlregtype"). Empty ();