C#将数据写入记事本并且从记事本中读出
我想用C#将一行行数据（textbox）里边的写入到记事本，然后在把数据从记事本中读出来写到一个listbox中，请问应该怎样写，能否给出关键代码，急用，先谢谢了
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友情一顶
为什么这么麻烦？
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用StreamWriter和StreamReader,一个读,一个写,而且这两个类读写效率高！
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用StreamWriter和StreamReader 我就用这种
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using System.io;fileStream fs=new fileStream ("yourtxt.txt",fileMode.Create);StreamWirte sw=new StreamWirte (fs);sw.WriteLine(textbox.Text);sw.Close();fs.Close();
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楼上已经把代码展出来了！
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using System.IO;//写入StreamWriter sw = new StreamWriter( @"C:\temp123.txt");sw.WriteLine("----------------hello----------------");sw.WriteLine("内容");sw.WriteLine("----------------hello----------------");sw.Flush();sw.Close();//读取System.IO.StreamReader st;st = new System.IO.StreamReader(@"C:\temp123.txt", System.Text.Encoding.UTF8);//UTF8为编码this.textBox1.Text = st.ReadToEnd();
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StreamWriter和StreamReader
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oFileStream = new FileStream("文件路径", FileMode.Create, FileAccess.Write, FileShare.ReadWrite);StreamWriter oStreamWriter = new StreamWriter(oFileStream, Encoding.Default);oStreamWriter.Write("要写入内容");oStreamWriter.WriteLine();oStreamWriter.Close();oFileStream.Close();
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我觉的你好麻烦啊 对文件操作是很浪费资源的 写进去再读出来 你可以将写进去的内容保存在一个变量中 然后直接赋值给listbox就好了啊 这样就不用再二次读出来了 同时 你把内容再写进记事本里就好了 代码网上多的是 你可以去百度
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void File.WriteAllText(filepath, content)
string[] File.ReadAllLine(filepath)
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温故而知新
学而不厌
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/// <summary>
/// 写数据到文件
/// </summary>
/// <param name="strDataList">行数据列表</param>
/// <param name="filename">文件名</param>
/// <returns>是否成功</returns>
public static bool WriteToFile(List<string> strDataList,string filename)
{
try
{
//Pass the filepath and filename to the StreamWriter Constructor
// StreamWriter sw = new StreamWriter(filename);
StreamWriter sw = new StreamWriter(filename,false,Encoding.GetEncoding("gb2312"));
sw.Write("", false);
//Write a line of text
foreach (string item in strDataList)
{
sw.WriteLine(item, true);
}
//Close the file
sw.Close();
return true;
}
catch (Exception e)
{
return false;
}
}
/// <summary>
/// 从文件获取数据
/// </summary>
/// <param name="fileName">文件名</param>
/// <returns>行数据列表</returns>
public static List<string> ReadFromFile(string fileName)
{
List<string> dataList = new List<string>();
String line;
try
{
//Pass the file path and file name to the StreamReader constructor
StreamReader sr = new StreamReader(fileName, Encoding.GetEncoding("gb2312"));
//Read the first line of text
line = sr.ReadLine();
//Continue to read until you reach end of file
while (line != null)
{
dataList.Add(line);
//Read the next line
line = sr.ReadLine();
}
//close the file
sr.Close();
}
catch (Exception e)
{
dataList = null;
}
return dataList;
}
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受教了！谢谢！
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受教了！谢谢！
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//检查文件是否存在
if (!File.Exists(filepath)) return null;
//读起文件流
FileStream fs = new FileStream(filepath, FileMode.OpenOrCreate, FileAccess.Read);
StreamReader m_streamRead = new StreamReader(fs, System.Text.Encoding.Default);
m_streamRead.BaseStream.Seek(0, SeekOrigin.Begin);
string s = m_streamRead.ReadToEnd();
m_streamRead.Close();
fs.Close();
string[] sList=s.Split('\n');
//再把数组给List绑定
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嗯顶一个
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up
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google一下CSV文件操作。
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学习
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using System.io;
fileStream fs=new fileStream ("yourtxt.txt",fileMode.Create);
StreamWirte sw=new StreamWirte (fs);
sw.WriteLine(textbox.Text);
sw.Close();
fs.Close();
上面是写入
下面上读取到ListBox
fileStream fs=new fileStream ("yourtxt.txt",fileMode.Open);
StreamRead sr=new StreamRead (fs);
listbox.text=sr.ReadToEnd()
sr.Close();
fs.Close();
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StreamWriter和StreamReader
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如果是 ini格式的配置文件可以这样
[DllImport("kernel32")] private static extern long WritePrivateProfileString(string section,string key,string val,string filePath); //参数说明：section：INI文件中的段落；key：INI文件中的关键字；val：INI文件中关键字的数值；filePath：INI文件的完整的路径和名称。C＃申明INI文件的读操作函数GetPrivateProfileString(): [DllImport("kernel32")] private static extern int GetPrivateProfileString(string section,string key,string def,StringBuilder retVal,int size,string filePath); //参数说明：section：INI文件中的段落名称；key：INI文件中的关键字；def：无法读取时候时候的缺省数值；retVal：读取数值；size：数值的大小；filePath：INI文件的完整路径和名称。
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单独的对文本文件的读写，没有那么复杂的！
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不错的,顶了
/// <summary> /// 将存贮在文本文件中的数据绑定到DropDownList中 test,test /// </summary> /// <param name="drdlst">下拉菜单</param> /// <param name="filePath">虚拟路径</param> public void Drdlst_BindDataByTxt1(DropDownList drdlst, string filePath) { string fileName = HttpContext.Current.Server.MapPath(filePath); string content = ""; StreamReader sr = null; try { //打开文件并显示其内容 sr = new StreamReader(fileName, System.Text.Encoding.Default); for (string line = sr.ReadLine(); line != null; line = sr.ReadLine()) { content += line.ToString(); } string[] arr = content.Split(','); for (int i = 0; i < arr.Length; i++) { ListItem li = new ListItem(); li.Text = arr[i].ToString(); li.Value = arr[i].ToString(); drdlst.Items.Add(li); } } catch (IOException ee) { HttpContext.Current.Response.Write("<script>alert(" + ee.Message + ")</script>"); } finally { if (sr != null) { sr.Close(); } } } /// <summary> /// 获取txt中信息 /// </summary> /// <param name="filePath">虚拟路径</param> /// <returns></returns> public string GetTxtInfo(string filePath) { string fileName = HttpContext.Current.Server.MapPath(filePath); string str = ""; StreamReader sr = null; try { sr = new StreamReader(fileName, System.Text.Encoding.Default); for (string line = sr.ReadLine(); line != null; line = sr.ReadLine()) { str += line.ToString(); } } catch (IOException ee) { HttpContext.Current.Response.Write("<script>alert(" + ee.Message + ")</script>"); } finally { if (sr != null) { sr.Close(); } } return str; } /// <summary> /// 保存数据到txt中 /// </summary> /// <param name="str">要保存的数据</param> /// <param name="filePath">虚拟路径</param> public void SaveTxtInfo(string str, string filePath) { string fileName = HttpContext.Current.Server.MapPath(filePath); StreamWriter sw = null; FileStream oFileStream = null; try { if (!System.IO.File.Exists(fileName)) { oFileStream = new FileStream(fileName, FileMode.Create, FileAccess.Write, FileShare.ReadWrite); } else { oFileStream = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.Write, FileShare.ReadWrite); } sw = new StreamWriter(oFileStream, Encoding.Default); sw.Write(str); sw.WriteLine(); } catch (IOException ee) { HttpContext.Current.Response.Write("<script>alert(" + ee.Message + ")</script>"); } finally { if (sw != null) { sw.Close(); oFileStream.Close(); } } }
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StreamWriter和StreamReader
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lz rp真好，这么多人回答而且被推荐了。答案都在上面了，LZ好好消化一下吧。
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用StreamReader, StreamWriter, 具体使用可以查询msdn.
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using System.IO;
//写入
StreamWriter sw = new StreamWriter( @"C:\temp123.txt");
sw.WriteLine("----------------hello----------------");
sw.WriteLine("内容");
sw.WriteLine("----------------hello----------------");
sw.Flush();
sw.Close();
//读取
System.IO.StreamReader st;
st = new System.IO.StreamReader(@"C:\temp123.txt", System.Text.Encoding.UTF8);//UTF8为编码
this.textBox1.Text = st.ReadToEnd();
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干嘛这么麻烦？直接从文本框里读出来写到列表框里不就行了嘛！！！
list1.Items.AddRange(textbox1.Lines); //一句代码就搞定了。
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using (SrmR = new StreamReader(path, Encoding.GetEncoding("GB2312")))
{
while (!SrmR.EndOfStream)
{
...
}
}
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filestream 文件数据流操作就可以了!
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this.listBox1.Items.add(ss);
}
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基本的IO操作！