我想根据一些数据用文件的现有行替换文本行。我开发了一些代码块，但它没有用。 我的文本文件是这样的： -
g_start-fd,g_start-cnst,g_start-eq,mv-mv_size,mv-mv_alloy,mv-mv_argmt,mv-mv_ps,xfrmr-kva,g_end-line_t,g_end-str_num,g_end-cmt,g_end-str_coord-Latitude,g_end-str_coord-Longitude
28F1Y,oh,mv oh,120,al,oh_3,P45R24,,i,P45R25,,9.53725695,-0.86668464
28F1Y,oh,mv oh,120,al,oh_3,P45R25,,i,P45R42,,9.5468355,-0.85948875
28F1Y,oh,mv oh,120,al,oh_3,P45R42,,i,P45R49,,9.55073989,-0.85625858
28F1Y,oh,mv oh,120,al,oh_3,P45R49,,a,P45R25,,,
28F1Y,oh,mv oh,120,al,oh_3,P45R54,,i,P45R55,,9.5544981,-0.85359626
28F1Y,oh,mv xfrmr,120,al,oh_3,P45R55,5000,e,P45R56,Substation,9.5549907,-0.85303108
28F1Y,ug,mv,185,al,xlpe_3,P45R56,,e,P45R55,,,
28F1Y,ug,mv,185,al,xlpe_3,P45R57,,s,P45R58,Take off from ring main,9.55387622,-0.8538622
28F1Y,oh,mv oh,120,al,oh_3,P45R58,,a,P45R73,,9.54513187,-0.86060037
28F1Y,oh,mv oh,120,al,oh_3,P45R73,,a,P45R77,,9.5417936,-0.86098952
28F1Y,oh,mv oh,120,al,oh_3,P45R77,,a,P45R80,,9.54144045,-0.85857346
28F1Y,oh,mv oh,120,al,oh_3,P45R80,,a,P45R86,,9.53675765,-0.85935176
28F1Y,oh,mv,120,al,oh_3,P45R86,,e,P45R80,,,
我的应用程序在运行此代码时停止工作：
string fileName1 = "D:\\WriteTextWork\\Line1.txt"; ;
OpenFileDialog pfdg = new OpenFileDialog();
if (pfdg.ShowDialog() == DialogResult.OK)
{
fileName1 = pfdg.FileName;
}
if (File.Exists(fileName1))
{
StreamReader SR = new StreamReader(fileName1);
string Data = null;
int count = 0;
while ((Data = SR.ReadLine()) != null)
{
count++;
if (count > 1)
{
string CopyText = "";
String[] SplitData = Data.Split(',');
if (SplitData[9] != null && SplitData[11] != null)
{
CopyText = Data;
string data1 = SR.ReadLine();
//MessageBox.Show(CopyText);
}
using (StreamReader SR1 = new StreamReader(fileName1))
{
//var SW = new StreamWriter(resultString1);
string line;
while ((line = SR1.ReadLine()) != null)
{
//String TrimData2 = line.Trim();
String[] SplitText = line.Split(',');
if (SplitText[9] == SplitData[9] && SplitText[11] == null)
{
using (StreamWriter SW = new StreamWriter(resultString1))
{
SW.WriteLine(CopyText);
MessageBox.Show(CopyText);
SW.Close();
}
}
}
SR1.Close();
}
}
}
}
答案 0 :(得分：0)
要强制您的代码工作，只需替换：
if (SplitText[9] == SplitData[9] && SplitText[11] == null)
要：
if (SplitText[9] == SplitData[9] && SplitText[11] == String.Empty)
因为SplitText [11]在您共享的文件中的所有情况下永远不会为空。
答案 1 :(得分：0)
我做了一个事件（btn_proceed_Click）来继续这个方法，你可以把他（方法）放在你想要的任何地方。这是完整的代码，只需用你的代码替换它：
private void btn_proceed_Click(object sender, EventArgs e)
{
// This dictionary contains indices of rows we need to replace.
Dictionary<int, int> replaceable = new Dictionary<int, int>();
replaceable.Add(4, 1);
replaceable.Add(7, 5);
replaceable.Add(13, 11);
string input = String.Empty;
OpenFileDialog pfdg = new OpenFileDialog();
if (pfdg.ShowDialog() == DialogResult.OK)
{
input = pfdg.FileName;
}
// I placed the result into the another file called result.txt. You can use output path as same as input to overwrite the file.
ReplaceLines(replaceable, input, @"C:\Users\Wallstrider\Documents\Visual Studio 2010\Projects\result.txt", 9);
}
/// <summary>
/// Replaces lines of the file depends on 9th item is exist.
/// </summary>
/// <param name="replaceable">Rows incides to replace.</param>
/// <param name="input_path">Path to the input file.</param>
/// <param name="output_path">Path to the output file.</param>
/// <param name="has_value_index">Index of a split data value in the row.</param>
private void ReplaceLines(Dictionary<int, int> replaceable, string input_path, string output_path, int has_value_index)
{
if (File.Exists(input_path))
{
string file;
file = new StreamReader(input_path).ReadToEnd();
string[] lines = file.Split(new char[] { '\n' });
List<string[]> split_data = new List<string[]>();
for (int i = 0; i < lines.Length; i++)
split_data.Add(lines[i].Split(','));
List<int> allowed_for_replace_indices = new List<int>();
List<int> not_allowed_for_replace_indices = new List<int>();
// Check if the row has the value of 9th item then we are allowed to replace rows.
for (int i = 1; i < split_data.Count; i++)
{
if (split_data[i][has_value_index] != String.Empty)
allowed_for_replace_indices.Add(i);
else
not_allowed_for_replace_indices.Add(i);
}
List<int> rows_replaced = new List<int>();
List<int> rows_not_replaced = new List<int>();
// Loop through our replaceable indices dictionary.
for (int i = 0; i < replaceable.Count; i++)
{
int key = replaceable.ElementAt(i).Key;
int value = replaceable.ElementAt(i).Value;
// if both rows have 9th item then we can start replacement.
if (allowed_for_replace_indices.Contains(key) && allowed_for_replace_indices.Contains(value))
{
string temp = lines[value];
lines[value] = lines[key];
lines[key] = temp;
rows_replaced.Add(key);
rows_replaced.Add(value);
}
else
{
rows_not_replaced.Add(key);
rows_not_replaced.Add(value);
}
}
using (StreamWriter sw = new StreamWriter(output_path))
{
for (int i = 0; i < lines.Length; i++)
sw.WriteLine(lines[i]);
sw.Flush();
sw.Close();
}
MessageBox.Show("Rows replaced: " + String.Join("; ", rows_replaced.ToArray()) + " .\nRows not replaced: " + String.Join("; ", rows_not_replaced.ToArray()) + ".\nComplete.");
}
}
以下代码将替换（我从零开始计算）4,1; 7,5; 13,11;如果我理解你的逻辑，如果每个都有第9个项目。