将标头添加到我的csv文件中

我想在我的CSV文件中添加标题，以便让数据反映标题。 如何在不必每次写入文件时添加它都可以解决这个问题？ 意思是我只想在每次导出时添加一次标题。 当导出到相同的文件名时，它不应该创建相同标题的重复项。 这是我下面的代码写入文件：

private void button6_Click_2(object sender, EventArgs e) { int count_row = dataGridView1.RowCount; int count_cell = dataGridView1.Rows[0].Cells.Count; MessageBox.Show("Please wait while " +comboBox5.Text+ " table is being exported.."); for (int row_index = 0; row_index <= count_row - 2; row_index++) { for (int cell_index = 1; cell_index <= count_cell - 1; cell_index++) { textBox8.Text = textBox8.Text + dataGridView1.Rows[row_index].Cells[cell_index].Value.ToString() + ","; } textBox8.Text = textBox8.Text + "\r\n"; } System.IO.File.WriteAllText("C:\\Users\\jdavis\\Desktop\\"+comboBox5.Text+".csv", textBox8.Text); MessageBox.Show("Export of " +comboBox5.Text+ " table is complete!"); textBox8.Clear(); } 

更新尝试：

  private void button6_Click_2(object sender, EventArgs e) { int count_row = dataGridView1.RowCount; int count_cell = dataGridView1.Rows[0].Cells.Count; MessageBox.Show("Please wait while " + comboBox5.Text + " table is being exported.."); if (!File.Exists(comboBox5.Text)) { string rxHeader = "Code" + "," + "Description" + "," + "NDC" + "," + "Supplier Code" + "," + "Supplier Description" + "," + "Pack Size" + "," + "UOM" + Environment.NewLine; for (int row_index = 0; row_index <= count_row - 2; row_index++) { for (int cell_index = 1; cell_index <= count_cell - 1; cell_index++) { textBox8.Text = textBox8.Text + dataGridView1.Rows[row_index].Cells[cell_index].Value.ToString() + ","; } textBox8.Text = textBox8.Text + "\r\n"; } System.IO.File.WriteAllText("C:\\Users\\jdavis\\Desktop\\" + comboBox5.Text + ".csv", textBox8.Text); MessageBox.Show("Export of " + comboBox5.Text + " table is complete!"); textBox8.Clear(); } } 

我真的想在没有SteamWriter的情况下尝试实现它，我哪里出错了？

 private void button6_Click_2(object sender, EventArgs e) { int count_row = dataGridView1.RowCount; int count_cell = dataGridView1.Rows[0].Cells.Count; string path = "C:\\Users\\jdavis\\Desktop\\" + comboBox5.Text + ".csv"; string rxHeader = "Code" + "," + "Description" + "," + "NDC" + "," + "Supplier Code" + "," + "Supplier Description" + "," + "Pack Size" + "," + "UOM"; MessageBox.Show("Please wait while " + comboBox5.Text + " table is being exported.."); for (int row_index = 0; row_index <= count_row - 2; row_index++) { for (int cell_index = 1; cell_index <= count_cell - 1; cell_index++) { textBox8.Text = textBox8.Text + dataGridView1.Rows[row_index].Cells[cell_index].Value.ToString() + ","; } textBox8.Text = textBox8.Text + "\r\n"; if (!File.Exists(path)) { System.IO.File.WriteAllText(path, rxHeader); System.IO.File.WriteAllText(path, textBox8.Text); } else { System.IO.File.AppendAllText(path, textBox8.Text); MessageBox.Show("Export of " + comboBox5.Text + " table is complete!"); textBox8.Clear(); } } } 

Answer 1

这是一个简短的版本，甚至可以正确处理包含的值,并且" ：

 dataGridView1.ClipboardCopyMode = DataGridViewClipboardCopyMode.EnableAlwaysIncludeHeaderText; dataGridView1.RowHeadersVisible = false; // the row headers column is copied too if visible dataGridView1.SelectAll(); // only the selected cells are used (the Windows Clipboard is not used) DataObject dataObject = dataGridView1.GetClipboardContent(); // 4 Data Formats: Text,Csv,HTML Format,UnicodeText File.WriteAllText("1.csv", dataObject.GetData("Csv") as string); // DataFormats.CommaSeparatedValue = "Csv" //string html = Encoding.ASCII.GetString((dataObject.GetData("HTML Format") as MemoryStream).ToArray()); // just the HTML Clipboard Format is in a MemoryStream 

Answer 2

这是我建议的解决方案。 我的建议是首先检查文件是否存在，然后决定是否需要写标题。

 private void DoTheWork(int fileIDtoUpdate) { //this is just my representation of what probably already exist in your project string textInTheTextBox = "blah blah blah blah\nI love text\nI love code\nI love to Code\ndon't you just love to code!"; string filePath1 = @"M:\StackOverflowQuestionsAndAnswers\40726017\File1.txt"; string filePath2 = @"M:\StackOverflowQuestionsAndAnswers\40726017\File2.txt"; string filePath3 = @"M:\StackOverflowQuestionsAndAnswers\40726017\File3.txt"; string filePath4 = @"M:\StackOverflowQuestionsAndAnswers\40726017\File4.txt"; string fileToWorkWith = string.Empty; //decide which file to work with switch (fileIDtoUpdate) { case 1: fileToWorkWith = filePath1; break; case 2: fileToWorkWith = filePath2; break; case 3: fileToWorkWith = filePath3; break; case 4: fileToWorkWith = filePath4; break; default: break; } //check if the file existed bool fileExisted = File.Exists(fileToWorkWith); using (StreamWriter sw = new StreamWriter(fileToWorkWith, true)) { if (!fileExisted) { //if the file did not exist, then you need to put your header line! sw.WriteLine("Write your Header Line here"); } sw.WriteLine(textInTheTextBox);//down here... who cares if the file existed or not, you need to append this text to it no matter what! } } 

Answer 3

只需使用此代码段编辑我的代码即可得到答案：

  if (!File.Exists(path)) { System.IO.File.WriteAllText(path, rxHeader + textBox8.Text); } else { System.IO.File.AppendAllText(path, textBox8.Text); MessageBox.Show("Export of " + comboBox5.Text + " table is complete!"); textBox8.Clear(); } 

Answer 4

 for (int row_index = 0; row_index <= count_row - 2; row_index++) { textBox8.Text = textBox8.Text + "\r\n"; for (int cell_index = 1; cell_index <= count_cell - 1; cell_index++) { textBox8.Text = textBox8.Text + dataGridView1.Rows[row_index].Cells[cell_index].Value.ToString() + ","; } } 

只需转到textBox8的属性pannel即可。 使用逗号添加文本并添加列标题，并将textbox8可见性设置为隐藏。