Can C# Console Apps Overwrite Existing Text on the Current Line?

Overriding console output in a C# Windows console application

When using C# Windows console applications, cursor manipulation is crucial to tailoring the user experience. This includes the ability to modify the current line without wrapping.

Question:

In a C# console application, is it possible to overwrite the existing text of the current line instead of appending new text? This is especially important when displaying progress bars or updating values ​​in real time without affecting the layout.

Solution:

Yes, it is possible to overwrite the current line in a C# console application. The key is to use the "r" character, which resets the cursor position to the beginning of the current line.

Here is a sample code snippet demonstrating this technique:

<code class="language-csharp">for (int i = 0; i < 100; i++)
{
    Console.Write("\r进度：{0}%      ", i + 1);
    Thread.Sleep(50);
}</code>

Instructions:

In this example, we use a for loop to iterate and display progress updates. Note the use of "r" before each update. This will reset the cursor to the beginning of the current line, allowing us to overwrite the previously displayed value with the updated percentage.

To ensure that the overwritten text completely covers the original text, we add some space after the updated percentage. This effectively erases any text that might have been there before.

It is important to note that we use Console.Write() instead of Console.WriteLine(). This is because we don't want to insert a newline character ("n") after every update, which would break the layout.

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