c# - 创建一个返回结果数组以显示在消息框中

Question

我有这个方法可以向用户返回一个显示结果的消息框。但是对于多个结果，每个结果都会出现消息窗口。我如何创建它以便将结果放入一个数组中，然后在最后在一个消息框中向用户显示所有结果？

 foreach (KeyValuePair<string, int> kvp in Comparer)
            {
                if (kvp.Value != 0)
                {
                    mismatches++;
                    string InWhich = kvp.Value > 0 ? firstFile : secondFile;
                    MessageBox.Show("Extra value \n"+kvp.Key+" \nfound in file " + InWhich);
                    if (Math.Abs(kvp.Value) != 1)
                        MessageBox.Show( Math.Abs(kvp.Value)+ "times");
                }
            }

Answer 1

使用 StringBuilder在循环中构建字符串，如下所示:

System.Text.StringBuilder theStringBuilder = new System.Text.StringBuilder();
foreach (KeyValuePair<string, int> kvp in Comparer)
{
    if (kvp.Value != 0)
    {
        mismatches++;
        string InWhich = kvp.Value > 0 ? firstFile : secondFile;
        theStringBuilder.AppendLine("Extra value \n"+kvp.Key+" \nfound in file " + InWhich);
        if (Math.Abs(kvp.Value) != 1)
            theStringBuilder.AppendLine( Math.Abs(kvp.Value)+ "times");
        }
    }
}

现在你可以显示StringBuilder中的所有内容了，像这样:

// Display all results in message box
MessageBox.Show(theStringBuilder.ToString());

更新:

要存储每个文件的更改，请使用 List<string> ，像这样:

var firstFileChanges = new List<string>();
var secondFileChanges = new List<string>();

System.Text.StringBuilder theStringBuilder = new System.Text.StringBuilder();
foreach (KeyValuePair<string, int> kvp in Comparer)
{
    if (kvp.Value != 0)
    {
        mismatches++;
        string InWhich = kvp.Value > 0 ? firstFile : secondFile;

        if(InWhich == firstFile)
        {
            firstFileChanges.Add(kvp.Key);
        }
        else 
        {
            secondFileChanges.Add(kvp.Key);
        }
    }
}

if(firstFileChanges.Count > 0 )
{
    theStringBuilder.Append("First file changes: ");

    int counter1 = 0;
    foreach(string change1 in firstFileChanges)
    {
        if(counter1 > 0)
        {
            theStringBuilder.Append(", ");
        }

        theStringBuilder.Append(change1);

        counter1 += 1;
    }

    theStringBuilder.AppendLine();
}

if(secondFileChanges.Count > 0 )
{
    theStringBuilder.Append("Second file changes: ");

    int counter2 = 0;
    foreach(string change2 in secondFileChanges)
    {
        if(counter2 > 0)
        {
            theStringBuilder.Append(", ");
        }

        theStringBuilder.Append(change2);

        counter2 += 1;
    }
}

MessageBox.Show(theStringBuilder.ToString());