这是现在的代码,我将包含该程序的所有代码,因为我之前留下了一些内容。由于你的帮助我改变了我用星号和///强调的位数 第一个类是直接编辑表单时从Windows窗体创建的标准类。
namespace DistanceEstimatorFinal
{
public partial class Form1 : Form
{
private bool saved;
public Form1()
{
dataPoints mydataPoints = new dataPoints();
InitializeComponent();
dataPoint a = mydataPoints.getItem(0);
latTextBox.Text = a.CurLatitude;
longTextbox.Text = a.CurLongtitude;
eleTextBox.Text = a.CurElevation;
saved = true;
}
private void latTextBox_TextChanged(object sender, EventArgs e)
{
}
private void openDataListToolStripMenuItem_Click(object sender, EventArgs e)
{
OpenFileDialog ofd = new OpenFileDialog();
ofd.Filter = "CSV files (*.csv)|*.csv|Text files ( *.txt)|*.txt |All files (*.*)|*.*";
if (ofd.ShowDialog(this).Equals(DialogResult.OK))
{
*var dp = new dataPoints (ofd.FileName);* /////
}
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (saved)
{
if (MessageBox.Show("Save?", "Data Not Saved", MessageBoxButtons.YesNo).Equals(DialogResult.Yes))
{
SaveFileDialog sfd = new SaveFileDialog();
sfd.ShowDialog();
}
}
}
private void saveAsToolStripMenuItem_Click(object sender, EventArgs e)
{
SaveFileDialog sfd1 = new SaveFileDialog();
sfd1.Filter = "CSV files (*.csv)|*.csv|Text files ( *.txt)|*.txt |All files (*.*)|*.*";
sfd1.ShowDialog();
}
}
}
这个类旨在读取文件中的数据,我目前正在调整它以从open函数中读取文件。
namespace DistanceEstimatorFinal
{
public class dataPoints
{
List<dataPoint> Points;
string p;
public dataPoints(string path)
{
p = path;
Points = new List<dataPoint>();
StreamReader tr = new StreamReader(p);
string input;
while ((input = tr.ReadLine()) != null)
{
string[] bits = input.Split(',');
dataPoint a = new dataPoint(bits[0],bits[1],bits[2]);
Points.Add(a);
}
tr.Close();
}
internal dataPoint getItem(int p)
{
if (p < Points.Count)
{
return Points[p];
}
else
return null;
}
}
}
此文件包含三个变量Distance,latitude和Longtitude。
namespace DistanceEstimatorFinal
{
class dataPoint
{
private string latitude;
private string longtitude;
private string elevation;
public dataPoint() //Overloaded incase no value available
{
latitude = "No Latitude Specified";
longtitude = "No Longtitude Specified";
elevation = "No Elevation Specified";
}
public dataPoint(string Latitude, string Longtitude, string Elevation)
{
// TODO: Complete member initialization
this.latitude = Latitude;
this.longtitude = Longtitude;
this.elevation = Elevation;
}
public string CurLongtitude { get { return this.longtitude; } }
public string CurLatitude { get { return this.latitude; } }
public string CurElevation { get { return this.elevation; } }
}
答案 0 :(得分:3)
您的pathFile
是方法局部变量,因此除了该方法的主体(此处为openDataListToolStripMenuItem_Click
)之外,它在任何地方都不可用。
您可以向dataPoints
构造函数添加一个参数,以将该值传递给类:
public class dataPoints
{
List<dataPoint> Points;
public dataPoints(string path)
{
Points = new List<dataPoint>();
//here `path` from constructor arguments
TextReader tr = new StreamReader(path);
//...rest part of your code
}
此外,您必须将值传递给此构造函数。您没有显示代码,您必须创建dataPoints
个实例。
var dp = new dataPoints(pathFile);
但请记住,pathFile
只能在openDataListToolStripMenuItem_Click
中访问。因此,您应该在那里创建dataPoints
,或者使pathFile
表单的字段可以在该表单的任何方法中访问。然后,您将有机会以此表单的任何方法访问pathFile
。
根据your previous post,这应该是:
private void openDataListToolStripMenuItem_Click(object sender, EventArgs e)
{
OpenFileDialog ofd = new OpenFileDialog();
ofd.Filter = "CSV files (*.csv)|*.csv|Text files ( *.txt)|*.txt |All files (*.*)|*.*";
if (ofd.ShowDialog(this).Equals(DialogResult.OK))
{
//actually you don't even need to have a separate `pathFile` variable
//just pass the value from the dialog straight to your `dataPoints` object
var dp = new dataPoints(ofd.FileName);
//...rest of your code
}
}
P.S。:偏离主题,但请考虑阅读MSDN Guidelines for Names