编码:C#中的SaveAs和Save Click事件 [英] Coding: SaveAs and Save Click Event in C#

问题描述

使用Windows窗体应用程序

Using Windows Forms Application

使用C#

使用saveDialog

Using saveDialog

问题:

如果我为已存在的文件单击保存"按钮时不希望看到saveDialog，该怎么办?

What if I do not want to see a saveDialog when I click a Save Button for a file that already exists?

如果我为不存在的文件单击保存"按钮时只想看到saveDialog，该怎么办?

What if I only want to see saveDialog when I click a Save Button for a file that does not exist?

msdn仅引入可处理SaveAs(创建新文件)的saveDialog，而不会保存(将更改保存到文件).

msdn only introduces saveDialog that handles SaveAs (creates new file), but not Save (saves changes to file).

我强烈希望我的问题足够清楚

I strongly hope my questions are clear enough

感谢您为此付出的宝贵时间.

and I thank you for spending your valuable time on this.

我是Chieki先生(从香港写信)

I am Mr. Chieki (writing from Hong Kong)

推荐答案

Chieki

Hi Chieki,

谢谢你在这里摆姿势.

对于您的问题，请尝试以下代码.我尝试过这个.效果很好.

For your question, please try the following code. I tried it. It works well.

在设计器中.

这是代码.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace saveDialog
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            saveFileDialog1.FileName = textBox1.Text;
            if (!File.Exists(saveFileDialog1.FileName))
            {
                // When user clicks button, show the dialog.
                saveFileDialog1.ShowDialog();
            }   
        }
    }
}

在我的计算机上，存在123.txt.

In my computer there is 123.txt exist.

当我输入123.txt之类的文件名时，没有保存对话框出现.

When I input filename like 123.txt, there is no save dialog appears.

当我输入不存在的文件名时，这是输出.

When I input filename which does not exist, here is the output.

我希望这会对您有所帮助.

I hope this would be helpful to you.

如果还有其他问题，请随时与我们联系.

If you have something else, please feel free to contact us.

最好的问候，

温迪

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