单击“提交”按钮后,将数据写入文件

时间:2019-02-17 11:39:34

标签: c# html razor

现在,我的文本文件包含以下数据:
4
3
2
1

我的程序能够读取数据并将其转换为整数。

我在尝试单击按钮时将各自的数据增加+1并将其写入文本文件时遇到问题。

  

如果(请求[“提交”] ==“ vote_kim”)   
当用户单击“ vote_kim”按钮时,我尝试使用上述代码,程序将+1到文本文件中的第一个值,但是当我检查文件时,数据未写入。我在这里我做错了什么,应该改变什么?

@{
    var result = "";
    string[] userData = null;
    int[] votes = null;
    char[] delimiterChar = { ',' };
    var lines = "";

    var dataFile = Server.MapPath("~/App_Data/data.txt");

    if (File.Exists(dataFile))
    {
        userData = File.ReadAllLines(dataFile);
        votes = Array.ConvertAll(userData, int.Parse);
        if (userData == null)
        {
            // Empty file.
            result = "The file is empty.";
        }
    }
    else
    {
        // File does not exist.
        result = "The file does not exist.";
    }

    if (IsPost)
    {
        if (Request["submit"] =="vote_kim")
        {
            votes[0] += 1;
            for (int i = 0; i < votes.Length; i++)
            {

                lines = votes[i] + Environment.NewLine;
                File.AppendAllText(@dataFile, lines);
                result = "Your vote has been saved.";

            }
        }
    }

    //votes[0] += 1;
    }
<!DOCTYPE html>

<html>
<head>
    <title>Task 3</title>
</head>
<body>
    <form id="form1" method="post">
        <div>
            <table>
                <tr>
                    <td>Kim</td>
                    <td><input id="vote_kim" type="submit" name="vote_kim" value="vote_kim" /></td>
                    <td>@votes[0]</td>
                </tr>
                <tr>
                    <td>Tom</td>
                    <td><input id="vote_tom" type="submit" name="vote_tom" value="vote_tom" /></td>
                    <td>@votes[1]</td>
                </tr>
                <tr>
                    <td>Jerry</td>
                    <td><input id="vote_jerry" type="submit" name="vote_jerry" value="vote_jerry" /></td>
                    <td>@votes[2]</td>
                </tr>
                <tr>
                    <td>Eric</td>
                    <td><input id="vote_eric" type="submit" name="vote_eric" value="vote_eric" /></td>
                    <td>@votes[3]</td>
                </tr>
            </table>
        </div>
        <div>
            @if (result != "")
            {
                <p>Result: @result</p>
            }
        </div>
    </form>

</body>
</html>

0 个答案:

没有答案