[英]How to increment value whenever same button is clicked?
我希望每當用戶單擊“ Vote Harry”按鈕時，int countHarry都將遞增1。 輸出將被寫入“ data.txt”中。 但是，我的data.txt僅將值顯示為1。 謝謝。
這是一個.cshtml文件。
當前輸出：Harry，1預期輸出：Harry，3（每次單擊時，int值都會增加）
@{ var result = ""; int countJohn = 1; int countHarry = 1; if (IsPost) { var dataFile = Server.MapPath(@"~/App_Data/data.txt"); if (Request["submit"] == "Vote Harry") { //var harry = Request["Harry"]; var userData = "Harry" + "," + countHarry + Environment.NewLine; File.AppendAllText(@dataFile, userData); // countHarry += countHarry; does not increases the count inside .txt at all result = "Information saved."; } else if (Request["submit"] == "Vote John") { //var john = Request["John"]; var userData = "John" + "," + (Int32.Parse("1")) + Environment.NewLine; File.AppendAllText(@dataFile, userData); result = "Information saved."; countJohn += 1; } } }
<!DOCTYPE html> <html> <head> <title>Elections</title> </head> <body> <form id="form1" method="post"> <div> <table> <tr> <td>Harry</td> <td><input id="Harry" name="submit" type="submit" value="Vote Harry"/></td> </tr> <tr> <td>John</td> <td><input id="John" name="submit" type="submit" value="Vote John" /></td> </tr> <tr> <td>Bryan</td> <td><input id="Bryan" name="submit" type="submit" value="Vote Bryan" /></td> </tr> <tr> <td>Jack</td> <td><input id="Jack" name="submit" type="submit" value="Vote Jack" /></td> </tr> </table> </div> <div> @if (result != "") { <p>Result: @result</p> } </div> </form> </body> </html>
我想您只需要在此處定義countHarry：
@{
var result = "";
int countJohn = 1;
int countharry = 1;
現在，您可以在任何需要的地方進行購物，因為它是“全球性的”。
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