Question

我遇到了格式化foreach循环输出的问题。如何在代码下面显示格式化输出？我目前正在使用以下代码：

            foreach (AddEntry list in addedEntry)
            {
                // Displaying and formating the output in text box in MainWindow. 
                mainWindow.ChangeTextBox += list.Type + Environment.NewLine;
                if (cmbType.SelectedIndex == 1) 
                    mainWindow.ChangeTextBox += "URL: " + list.URL + Environment.NewLine;
                if (cmbType.SelectedIndex == 2) 
                    mainWindow.ChangeTextBox += "Software Name: " + list.SoftwareName + Environment.NewLine;
                if (cmbType.SelectedIndex == 2) 
                    mainWindow.ChangeTextBox += "Serial Code: " + list.SerialCode + Environment.NewLine;
                if (cmbType.SelectedIndex == 0 || cmbType.SelectedIndex == 1) 
                    mainWindow.ChangeTextBox += "User Name: " + list.UserName + Environment.NewLine;
                if (cmbType.SelectedIndex == 0 || cmbType.SelectedIndex == 1) 
                    mainWindow.ChangeTextBox += "Password: " + list.Password + Environment.NewLine;
                mainWindow.ChangeTextBox += Environment.NewLine;
            }

首先输出：

PC Password
User Name: a
Password: b

然后添加另一个条目......

第二次输出：

PC Password
URL: e // this should not be here
User Name: a
Password: b

Web Site Password
URL: www.
User Name: www
Password: www

第二个输出应为：

PC Password
User Name: a
Password: b

Web Site Password
URL: www.
User Name: www
Password: www

希望得到一些提示。

问候。

Answer 1

将DisplayType = cmdType.SelectedIndex添加到AddEntry

尝试使用String Builder吗？

StringBuilder sb = new StringBuilder(mainWindow.ChangeTextBox);
foreach (AddEntry list in addedEntry)
{
    sb.AppendLine(list.Type);

    if (list.DisplayType == 1) 
        sb.AppendLine("URL: " + list.URL);

    if (list.DisplayType == 0 || list.DisplayType == 1) {
        sb.AppendLine("User Name: " + list.UserName);
        sb.AppendLine("Password: " + list.Password);
    }

    if (list.DisplayType == 2) {
        sb.AppendLine("Software Name: " + list.SoftwareName);
        sb.AppendLine("Serial Code: " + list.SerialCode);
        sb.AppendLine("Software Name: " + list.SoftwareName);
    }

    sb.AppendLine();
}  

mainWindow.ChangeTextBox = sb.ToString();

注意临时变量

Answer 2

每个循环都要向输出中添加更多文本。将结果添加到StringBuilder中，然后显示其输出。

StringBuilder sb = new StringBuilder();
sb.Append("your text");
sb.Append("more text");
MainWindow.ChangeTextBox = sb.ToString()

为什么不在块中包含你的代码：


if (cmbType.SelectedIndex == 2) 
{
   //string builder recommended instead but....
   mainWindow.ChangeTextBox += "Software Name: " + list.SoftwareName + Environment.NewLine;
   mainWindow.ChangeTextBox += "Serial Code: " + list.SerialCode + Environment.NewLine;
}

来自foreach循环和IF语句的不需要的输出

2 个答案: