Copy Code code as follows:
<asp:textbox id= "TextBox1" onkeyup= "if (isNaN) execcommand (' Undo ')" runat= "Server"
Width= "80px" onafterpaste= "if (isNaN (value)) ExecCommand (' Undo ')" ></asp:textbox>
In fact, server controls can also add onkeydown and up events such as
That's it. You can only enter decimals and digits
In. NET development, in order to ensure the correctness of the data, often the user input to verify the content, the analogy is that only the number of input.
First, add a property event to the TextBox control:
Copy Code code as follows:
<asp:textbox class= "Text"
Onkeypress= "if (Event.keycode < | | | Event.keycode >57) Event.returnvalue = false;"
Id= "Txty_revenue" style= "Text-align:right" runat= "Server" width= "90%" maxlength= ">"
</asp:textbox>
Check if the keyboard is pressed 0-9, if not, do not put the current input into the text box
Note: This method controls the textbox to enter only numbers: 0~9, providing a way of thinking
Add:
1. The dashed box when the Cancel button is pressed
Add attribute value in input hidefocus or hidefocus=true
2. Read-only text box contents
Add attribute value in input readonly
3. Prevent back-emptying of the text document (you can make the style content as a class reference)
Copy Code code as follows:
<input Style=behavior:url (#default #savehistory); Type=text id=opersistinput>
The 4.ENTER key allows the cursor to move to the next input box
Copy Code code as follows:
<input onkeydown= "if (event.keycode==13) event.keycode=9" >
5. Only for Chinese (with flashing)
Copy Code code as follows:
<input onkeyup= "Value=value.replace (/[-~]/g, '") "onkeydown=" if (event.keycode==13) event.keycode=9 "> Use the range of ASCII code to judge
6. Only for numbers (with flashing)
Copy Code code as follows:
<input onkeyup= "Value=value.replace (/[^\d]/g,") "Onbeforepaste=" Clipboarddata.setdata (' text ', Clipboarddata.getdata (' text '). Replace (/[^\d]/g, ') "> Use the range of ASCII code to judge
7. Only for numbers (no flashing)
Copy Code code as follows:
<input style= "ime-mode:disabled" onkeydown= "if (event.keycode==13) event.keycode=9" onkeypress= "if ( event.keycode<48 | | event.keycode>57) Event.returnvalue=false "> Using the range of ASCII code to judge
8. Can only input English and digital (with flashing)
Copy Code code as follows:
<input onkeyup= "Value=value.replace (/[\w]/g,") "Onbeforepaste=" Clipboarddata.setdata (' text ', Clipboarddata.getdata (' text '). Replace (/[^\d]/g, ') "> verify using JS Regular expression
9. Shielding Input Method
Copy Code code as follows:
<input type= "text" name= "url" style= "ime-mode:disabled" onkeydown= "if (event.keycode==13) event.keycode=9" >
10. Only digits, decimal points, minus (-) characters (no flashing) can be entered.
Copy Code code as follows:
<input onkeypress= "If" (event.keycode!=46 && event.keycode!=45 && (event.keycode<48 | | event.keycode>57) Event.returnvalue=false "> Using the range of ASCII code to judge
11. Can only enter two decimal places, three decimal places (with flashing)
Copy Code code as follows:
<input maxlength=9 onkeyup= "If" (Value.match (/^\d{3}$/)) Value=value.replace (Value,parseint (VALUE/10)) value= Value.replace (/\.\d*\./g, '. ') "onkeypress=" if (event.keycode<48 | | event.keycode>57) && Event.keycode !=46 && event.keycode!=45 | | Value.match (/^\d{3}$/) | | /\.\d{3}$/.test (value)) {Event.returnvalue=false} "Id=text_kfxe name=text_kfxe> uses the regular expression of JS to authenticate.
In fact, do not limit the user's input in the application, as long as the user to verify the input can be, because this limit often brings a bad experience
