JavaScript Window.confirm This method is very useful, you can pop up a confirmation dialog box
The reason we pop up this dialog is because the operation is dangerous, so the user can confirm it. However, if you select OK by default, this principle may be violated.
In addition, the buttons on the confirm dialog are fixed to the two "OK" and "Cancel". It may not be intuitive at times.
So, consider using the MsgBox in VBScript to rewrite this behavior. Here is an example
Copy Code code as follows:
<%@ Page language= "C #" autoeventwireup= "true" codebehind= "Default.aspx.cs" inherits= "Webapplication1._default"% >
<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
<title></title>
<script>
function Deleteconfirm (msg)
{
function Window.confirm (str)
{
str= str.replace (/\ '/g, "' & Chr () &"). Replace (/\r\n/g, "' & VBCrLf & '");
Execscript ("n = MsgBox (' + str +" ', 289, ' delete box ') "," VBScript ");
return (n = = 1);
}
return window.confirm (msg);
}
</script>
<body>
<form id= "Form1" runat= "Server" >
<div>
<asp:button id= "DeleteButton" runat= "onclientclick=" Javascript:return deleteconfirm (' Are you sure you want to delete it? ') text= "Delete"
onclick= "Deletebutton_click"/>
</div>
</form>
</body>
For details on the MsgBox method, you can also refer to the following introduction
MsgBox function
Displays a message in a dialog box, waits for the user to click the button, and returns a value indicating the button the user clicked.
MsgBox (prompt[, buttons][, title][, HelpFile, context))
Parameters
Prompt
A string expression displayed as a message in a dialog box. The maximum length of a prompt is approximately 1024 characters, depending on the width of the character being used. If the prompt contains more than one row, each row can be separated by a carriage return (CHR (13)), a newline character (CHR (10)), or a combination of a carriage return line feed (CHR & Chr (10)).
Buttons
A numeric expression that specifies the number and type of display buttons, the icon style used, the identity of the default button, and the sum of the values of the message box style. For numeric values, see the "Settings" section. If omitted, the default value for buttons is 0.
Title
A string expression displayed in the title bar of the dialog box. If you omit title, the name of the application is displayed in the title bar.
Helpfile
A string expression identifying the Help file that provides context-sensitive Help for a dialog box. If HelpFile is provided, the context must be provided. is not available on the 16-bit system platform.
Context
A numeric expression that identifies the context number assigned to a Help topic by the author of the Help file. If the context is already provided, HelpFile must be provided. is not available on the 16-bit system platform.
Set up
The buttons parameter can have the following values:
| Constants |
value |
Description |
| vbOKOnly |
0 |
Only the OK button is displayed. |
| vbOKCancel |
1 |
Displays the OK and cancel buttons. |
| Vbabortretryignore |
2 |
Displays the discard , retry , and ignore buttons. |
| vbYesNoCancel |
3 |
Displays Yes , no , and cancel buttons. |
| vbYesNo |
4 |
Show Yes and no buttons. |
| Vbretrycancel |
5 |
Displays the retry and cancel buttons. |
| vbcritical |
16 |
Displays the critical information icon. |
| Vbquestion |
32 |
Displays the warning query icon. |
| Vbexclamation |
48 |
Displays a warning message icon. |
| vbinformation |
64 |
Displays an informational message icon. |
| VbDefaultButton1 |
0 |
The first button is the default button. |
| VbDefaultButton2 |
256 |
The second button is the default button. |
| VbDefaultButton3 |
512 |
The third button is the default button. |
| VbDefaultButton4 |
768 |
The fourth button is the default button. |
| vbApplicationModal |
0 |
Application Mode: The user must respond to a message box in order to continue working in the current application. |
| Vbsystemmodal |
4096 |
System mode: All applications are suspended until the user responds to the message box. |
The first set of values (0-5) describes the type and number of buttons displayed in the dialog box; the second set of values (16, 32, 48, 64) is used to describe the style of the icon, the third set of values (0, 256, 512) is used to determine the default button, and the fourth set of values (0, 4096) determines the style of the message box. When these numbers are added to generate the buttons parameter values, only one number can be taken from each set of values.
return value
The MsgBox function has the following return value:
| Constants |
value |
Button |
| vbOK |
1 |
Are you sure |
| Vbcancel |
2 |
Cancel |
| Vbabort |
3 |
Give |
| Vbretry |
4 |
Retry |
| Vbignore |
5 |
Ignore |
| Vbyes |
6 |
Is |
| Vbno |
7 |
Whether |
description
If both the HelpFile and the context are provided, the user can press the F1 key to see the help topic that corresponds to the contextual.
If the dialog box displays the Cancel button, pressing the ESC key is the same as clicking Cancel. If the dialog box contains Help buttons, there is context-sensitive Help for the dialog box. However, no values are returned until the other buttons are clicked.
When Microsoft Internet Explorer uses the MsgBox function, the title of any dialog box always contains "VBScript" so that it distinguishes it from the standard dialog box.
The following example illustrates the use of the MsgBox function:
Copy Code code as follows:
Dim MyVar
MyVar = MsgBox ("Hello world!", "MsgBox Example")
' MyVar contains either 1 or 2, depending on which button is clicked
