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如何保存ListBox中数据在指定路径下

qaqaqaaaaaa 2020-03-06 09:09:28

C# 如何将ListBox中的数据保存进我TextBox控件指定的路径中？如下图

如下是我写的Button获取文件路径显示在TextBox中我该如何去保存呢
private void btn_Save_Click(object sender, EventArgs e)
{
FolderBrowserDialog dialog = new FolderBrowserDialog();
dialog.Description = "请选择文件路径";

if (dialog.ShowDialog() == DialogResult.OK)
{
string foldPath = dialog.SelectedPath;
DirectoryInfo theFolder = new DirectoryInfo(foldPath);

//theFolder 包含文件路径
tbx_Save.Text = dialog.SelectedPath;
FileInfo[] dirInfo = theFolder.GetFiles();
//遍历文件夹
foreach (FileInfo file in dirInfo)
{
MessageBox.Show(file.ToString());
}
}
}

...全文

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Bridge_go 2020-03-09

就是往 ListBox 添加 item 时都要用这个方法每添加 SaveCount个数据就将未写入的item写入到txt

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qaqaqaaaaaa 2020-03-09

我尝试了一下还是有很多问题不太能理解你的代码还是谢谢你非常感谢先结帖

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qaqaqaaaaaa 2020-03-09

foreach (var data in this.listBox1.Items)
{
if (!this.listBox2.Items.Contains(data))
{
this.listBox2.Items.Add(data);
}
label3.Text = (listBox2.Items.Count).ToString();
}
listBox1.Items.Clear();
if (label3.Text != comboBox1.Text)
{

MessageBox.Show("数据有误！", "错误");
}
else
{
}
可是我之前就将数据添加进ListBox中并且去重了

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qaqaqaaaaaa 2020-03-06

追问一条为什么我在选择路径的时候去新建文件夹就会报错第二次新建就不会出问题

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Bridge_go 2020-03-06

const int SaveCount = 2;
int _currentIndex = 0;
object _lock = new object();
void listBoxAddItem(object item)
{
    this.listBox1.Items.Add(item);
    if (this.listBox1.Items.Count - _currentIndex > SaveCount)
    {
        lock (_lock)
        {
            string path = tbx_Save.Text;
            string filePath = string.Format("{0}\\{1}.txt", path, DateTime.Now.ToString("yyyy-MM-dd"));
            using (System.IO.StreamWriter sw = new StreamWriter(filePath, true))
            {
                for (; _currentIndex < this.listBox1.Items.Count; _currentIndex++)
                {
                    sw.WriteLine(item.ToString());
                }
                sw.Close();
            }
        }
    }
}

都要用这个方法添加item

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qaqaqaaaaaa 2020-03-06

引用 2 楼 Bridge_go 的回复:

FolderBrowserDialog dialog = new FolderBrowserDialog();

dialog.Description = "请选择文件路径";



if (dialog.ShowDialog() == DialogResult.OK)

{

    string foldPath = dialog.SelectedPath;

    DirectoryInfo theFolder = new DirectoryInfo(foldPath);



    //theFolder 包含文件路径

    string path = dialog.SelectedPath;

    string filePath = string.Format("{0}\\{1}.txt", path, DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss-fff"));

    using (System.IO.StreamWriter sw = new StreamWriter(filePath))

    {

        foreach (var item in this.listBox1.Items)

        {

            sw.WriteLine(item.ToString());

        }

        sw.Close();

    }

}

我刚试了你的代码发现我描述有误我的目的是写一个函数我可以手动选择保存路径然后当ListBox中的数据量达到一定数量我就调用函数将数据保存在我选择的路径下可以用任何格式保存我的代码只实现了点击选择路径后将路径显示在TBX控件中请教一下怎么去写一个保存函数

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Bridge_go 2020-03-06

FolderBrowserDialog dialog = new FolderBrowserDialog();
dialog.Description = "请选择文件路径";

if (dialog.ShowDialog() == DialogResult.OK)
{
    string foldPath = dialog.SelectedPath;
    DirectoryInfo theFolder = new DirectoryInfo(foldPath);

    //theFolder 包含文件路径
    string path = dialog.SelectedPath;
    string filePath = string.Format("{0}\\{1}.txt", path, DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss-fff"));
    using (System.IO.StreamWriter sw = new StreamWriter(filePath))
    {
        foreach (var item in this.listBox1.Items)
        {
            sw.WriteLine(item.ToString());
        }
        sw.Close();
    }
}

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