Use the system;
Use System.Collections.Generic;
Use System.ComponentModel;
Use System.Text;
The use of system.web;
Use the System.Web.UI program;
Use System.Web.UI.WebControls;
Used in System.Collections;
Namespace Qc_control
{
< summary >
Custom Input drop-down box class
</Summary >
[ToolBoxData ("<{0}:custominputdropdowncontrol RUNAT = server > </{0}:custominputdropdowncontrol>")]
public class Custominputdropdowncontrol: text box
{
Ddllistitem of private DropDownList = new DropDownList (); drop-down box
Private text Box Txtbox = new TextBox ();
_values of private hashtable = new Hashtable (); Value used to bind the drop box
< summary >
Key value reference variable set/Get encapsulation method
</Summary >
Public Hashtable projects
{
Get
if (ViewState ["value"] = = NULL)
{
ViewState ["value"] = new Hashtable ();
}
Other {}
Hashtable s = (hash table) of ViewState ["value"];
return s;
}
set {ViewState ["value"] = value;}
}
< summary >
Default constructor
Initialized DropDownList and Hashtable instance variables
</Summary >
Public Custominputdropdowncontrol ()
{
This._values = new Hashtable ();
This.ddllistitem = new DropDownList ();
}
< summary >
Overriding the control class rendering method body
</Summary >
<param name = "Output" > </param>
Protection overwrite invalid render (output of HtmlTextWriter)
{Ddllistitem. ID = "DDL" + base.id;
Txtbox.id = "txt"+ base.id;
The beginning of the framework
Output. Write ("< table cellspacing = ' 0 ' cellpadding =" 0 "boundary = ' 0 ' > <TR> <td ALIGN =" Left "> the position of <span style = ' is: absolute; FRAME: for 1pt solid #c1c1c1; overflow: hidden; width:188px, Height: 19px; Clip: Rectangle ( -1px 190px 190px 170 pixels); > ");
ClientID is used here because when in the card option. NET program will automatically name the Base.id
DDLLISTITEM.ATTRIBUTES.ADD ("onchange", Getfocusvalue (txtbox.id,ddllistitem.id));
DDLLISTITEM.ATTRIBUTES.ADD ("Style", "width: 190px; Family: The margin-top:-2px of the song body; ）;
TXTBOX.ATTRIBUTES.ADD ("Style", "width: 170 megapixels, Height: 15px; frame: 0pt;" ）;
Traverse the data into the drop-down box object
, if (this. Item.count> 0)
{
The foreach (String Item.keys key)
{
List item item = new ListItem ();
Item. Value = key;
Item. Text = ToString () of project [key];
DDLLISTITEM.ITEMS.ADD (project);
}
}
Ddllistitem.rendercontrol (output);
Output. Write ("</span> 's <span style = ' position is: absolute; border top: solid for 1pt#c1c1c1; left box: 1pt solid #c1c1c1; border bottom: solid for 1pt#c1c1c1; width: 170 Megapixels, Height: 19px; " > ");
Txtbox.rendercontrol (output);
End of frame
Output. Write ("</span> </td> </t> </table>");
}
Responding to Event methods
Common string Getfocusvalue (string txtID, Strings Ddlid)
{
Return to "Java class" + "Cript:" + "document.getElementById ('" + txtID + "). The value = document.getElementById (' + Ddlid + ') is available for options [ document.getElementById (' "+ Ddlid +" '). SelectedIndex]. Value; " The ToString ();
}
}
}
