字符串替换为列表字典数据不磨损

本文关键字：数据不磨损字典列表替换字符串 | 更新日期: 2023-09-27 18:33:59

我试图用ListDictionary中的值替换html中的标记键。但它并没有按照我的预期工作。谁能给我一个解决方案。

我的替换方法

    public static string GetDataAddedTemplate(string htmlTemplate, ListDictionary replacements)
    {
        foreach (DictionaryEntry item in replacements)
        {
            htmlTemplate.Replace(item.Key.ToString().ToLower(), item.Value.ToString());
        }
        return htmlTemplate;
    }

我的 html 模板就像 folows 一样

    <html>
<body>
        <table align="left" border="0">
        <tr>
            <td>
                <table align="left" border="1" cellpadding="1" cellspacing="1" style="width: 200px;">
                    <thead>
                        <tr style="text-align:center">
                            <th>Bill To</th>
                        </tr>
                    </thead>
                    <tbody>
                        <tr style="text-align:center">
                            <td>
                                <<username>>
                                    <br />
                                    <br />
                                    <br />
                                    <br />
                                    <br />
                            </td>
                        </tr>
                    </tbody>
                </table>
            </td>
            <td>
                <table align="left" border="1" cellpadding="1" cellspacing="1">
                    <thead>
                        <tr style="text-align:center">
                            <th colspan="2">Payment information</th>
                        </tr>
                    </thead>
                    <tbody>
                        <tr>
                            <td>
                                Date
                            </td>
                            <td><<createddate>></td>
                        </tr>
                        <tr>
                            <td>Card holder</td>
                            <td><<cardname>></td>
                        </tr>
                        <tr>
                            <td>Card</td>
                            <td><<cardbrand>> ############<<cardnumber>></td>
                        </tr>
                        <tr>
                            <td>Amount paid</td>
                            <td>$<<amountpaid>></td>
                        </tr>
                    </tbody>
                </table>
            </td>
        </tr>
    </table>
    <p>&nbsp;</p>
    <p>&nbsp;</p>
    <p>&nbsp;</p>
    <p>&nbsp;</p>
    <p>
        Congratulations! You've successfully purchased the <<shares>> plan.
    </p>
    <table align="left" border="1" cellpadding="1" cellspacing="1" style="width: 500px;">
        <thead>
            <tr style="text-align:center">
                <th>Qty</th>
                <th>Plan</th>
                <th>Description</th>
                <th>Price</th>
            </tr>
        </thead>
        <tbody>
            <tr style="text-align:center">
                <td>1</td>
                <td><<shares>> Plan</td>
                <td></td>
                <td>$<<amountpaid>></td>
            </tr>
        </tbody>
    </table>
    <p>&nbsp;</p>
    <p>&nbsp;</p>
    <p>
        <strong>Thank You</strong>!<br />
        Your business is appreciated
    </p>
    <p>&nbsp;</p>
    <p>Team</p>
</body>
</html>
And my ListDictionary is as follows
    ListDictionary replacements = new ListDictionary
                                       {
                                           { "<<UserName>>", "DisplayName" }, 
                                           { "<<CardName>>", "Name" }, 
                                           { "<<CardNumber>>", "Last4" }, 
                                           { "<<CardBrand>>", "Brand" }, 
                                           { "<<AmountPaid>>", "Amount" }, 
                                           { "<<CreatedDate>>", "chargeDetails" }, 
                                           { "<<Shares>>", "shares" }
                                       };

字符串替换为列表字典数据不磨损

string是不

可变的。因此，调用 String.Replace 会返回一个新字符串，并且不会更改现有字符串。

您需要使用返回的字符串：

public static string GetDataAddedTemplate(string htmlTemplate, ListDictionary replacements)
{
    foreach (DictionaryEntry item in replacements)
    {
        // Use the string returned by Replace method
        htmlTemplate = htmlTemplate.Replace(item.Key.ToString().ToLower(), item.Value.ToString());
    }
    return htmlTemplate;
}

试试这个：

        foreach (DictionaryEntry item in replacements)
    {
        htmlTemplate = htmlTemplate.Replace(item.Key.ToString().ToLower(), item.Value.ToString());
    }