How to block double quotation marks in textbox

Just judge it in the keypress event.

private void textbox1_keypress(object sender, keypresseventargs e)}

string s = @"sjdfkljsaljf;lajsdf'js‘alkdjfklja";

if ("'") |"‘") |"’"))"no!");

Here is a little unclear, if the first one is to judge the single quotation marks under the English input, because the left half of the English is the same as the right half, so only judge, the last two are to judge the single quotation marks under Chinese, I tried, you must judge the left half and the right half respectively.

Double quotation marks""It is the identification character of asp, and cannot be valued, and you can use the full-width character "".

Double quotation marks as strings. It should be"", meaning, two double quotation marks, just one quotation mark"

I've studied in double quotes before.,There's a lot of courses in it.,You can also feel it.,You can learn more than just knowledge.,Nuclear Song Fiber's personal feeling is quite rented.,College students can use it to imitate what they learned in double quotes after they step into society.。

asp will put""Parsed. For example, your value is:"Me""You"

If you use aa=request("text") to get the string.

That's what it becomes. aa=""Me""You""

Such. I'll write you a function.

function format(str)a=replace(str,chr(32),"& nbsp;")a=replace(a,"'","& #39;")a=replace(a,"<","& lt;")a=replace(a,">","& gt;")a=replace(a,chr(13),"

a=replace(a,chr(34),"& quot;") 'When you use it, delete the space after the &.

format=a

end function

Use this aa=format(request("text"Then store the aa in the database. No problem.

value=<%=rs("The name of the field")%>

Do not use double and single quotation marks.

put"Replace all with &quat;That's it.

Only the function part is written.

using ;

Bool hasquote(string str)else is actually such a simple function that does not require regular expressions, and string traversal or segmentation can be judged.

Press shift+ directly for double quotation marks"What appears is "".""This tells Lu a sock to eliminate the belt, if you want to play Chinese, in the Chinese full-width state, the bridge letter enters shift+", the first input is the left """ and the second input is the right """.

private sub command1_click()dim f, s

f = instr(text1, """")if f > 0 then s = instr(f + 1, text1, """")

if s > 0 then

text2 = mid(text1, f + 1, s - f - 1)

elsetext2 = "Error, less than two double quotes"

end if

end sub