如何使用C#对话框允许用户选择保存位置而不选择文件名

Question

我制作了一个税务计算器(全部理论用于实践(，它有一个功能，用户可以按下按钮导出基本的PDF税务报告。根据是雇员还是承包商，对税务报告的要求略有不同。承包商的EmployeeID以"C"开头到目前为止一切都很好。

现在，我只要求承包商使用特定名称"ContractorTax"保存承包商PDF有没有一种方法可以创建一个安全的文件对话框，只允许用户在锁定文件名(我猜是文件扩展名(的情况下选择一个位置

这是我迄今为止拥有的相关代码：

//Creates PDF.
private void CreatePdf()
{           
//sets default options for save file
saveFileDialog1.FileName = "Tax Report for " + txtFirstName.Text + " " + txtSurname.Text;
saveFileDialog1.Filter = "PDF files (*.pdf)|*.pdf|All files (*.*)|*.*";
saveFileDialog1.DefaultExt = "pdf";
saveFileDialog1.ShowDialog();
/*- create FileStream object (fs) with pdf name, mode type, access type, and if it can be shared 
- create new document object (A4 page size)
- create a iTextSharp.text.pdf.PdfWriter object, it helps to write the Document to the Specified
FileStream 
- open document
- add paragraph
- close document*/
if (txtEmployeeID.Text.ToUpper().StartsWith("C"))
{
FileStream fs = new FileStream(saveFileDialog1.FileName, FileMode.Create, FileAccess.Write, FileShare.None);
Document doc = new Document(PageSize.A4);
PdfWriter writer = PdfWriter.GetInstance(doc, fs);
doc.Open();
doc.Add(new Paragraph("TAX REPORT" + nl + nl + "Employee ID: " + txtEmployeeID.Text.ToUpper() + nl + "Name: " + txtFirstName.Text + " " + txtSurname.Text + nl + "Mobile Number: " + txtMobileNumber.Text + nl +
"Email: " + txtEmail.Text + nl + "Department: " + comboBoxDepartment.Text + nl + "Salary: $" + salary.ToString() + nl + "Tax Payable: $" + taxPayable.ToString()));
doc.Close();
}
else
{
FileStream fs = new FileStream(saveFileDialog1.FileName, FileMode.Create, FileAccess.Write, FileShare.None);
Document doc = new Document(PageSize.A4);
PdfWriter writer = PdfWriter.GetInstance(doc, fs);
doc.Open();
doc.Add(new Paragraph("TAX REPORT" + nl + nl + "Employee ID: " + txtEmployeeID.Text.ToUpper() + nl + "Name: " + txtFirstName.Text + " " + txtSurname.Text + nl + "Mobile Number: " + txtMobileNumber.Text + nl +
"Department: " + comboBoxDepartment.Text + nl + "Salary: $" + salary.ToString() + nl + "Tax Payable: $" + taxPayable.ToString()));
doc.Close();
}

}

我以前发现有人问过这个问题，但答案只与Java相关，我使用的是visual studio 2017和C#编码。

Answer 1

对于您的问题，您希望指定雇主的税务收据名称，并且不能更改。

你可以尝试下面的代码来获得它。

private void CreatePdf()
{         
string path1 = "ContractorTax.pdf";
if (txtEmployeeID.Text.ToUpper().StartsWith("C")) 
{
FolderBrowserDialog dialog = new FolderBrowserDialog();
dialog.ShowDialog();
string path2 = Path.Combine(dialog.SelectedPath, path1);
FileStream fs = new FileStream(path2, FileMode.Create, FileAccess.Write, FileShare.None);
Document doc = new Document(PageSize.A4);
PdfWriter writer = PdfWriter.GetInstance(doc, fs);
doc.Open();
doc.Add(new Paragraph("TAX REPORT" + nl + nl + "Employee ID: " + txtEmployeeID.Text.ToUpper() + nl + "Name: " + txtFirstName.Text + " " + txtSurname.Text + nl + "Mobile Number: " + txtMobileNumber.Text + nl +
"Email: " + txtEmail.Text + nl + "Department: " + comboBoxDepartment.Text + nl + "Salary: $" + salary.ToString() + nl + "Tax Payable: $" + taxPayable.ToString()));
doc.Close();         
MessageBox.Show("success");
}
else
{
saveFileDialog1.FileName = "Tax Report for " + txtFirstName.Text + " " + txtSurname.Text;
saveFileDialog1.Filter = "PDF files (*.pdf)|*.pdf|All files (*.*)|*.*";
saveFileDialog1.DefaultExt = "pdf";
saveFileDialog1.ShowDialog();
FileStream fs = new FileStream(saveFileDialog1.FileName, FileMode.Create, FileAccess.Write, FileShare.None);
Document doc = new Document(PageSize.A4);
PdfWriter writer = PdfWriter.GetInstance(doc, fs);
doc.Open();
doc.Add(new Paragraph("TAX REPORT" + nl + nl + "Employee ID: " + txtEmployeeID.Text.ToUpper() + nl + "Name: " + txtFirstName.Text + " " + txtSurname.Text + nl + "Mobile Number: " + txtMobileNumber.Text + nl +
"Department: " + comboBoxDepartment.Text + nl + "Salary: $" + salary.ToString() + nl + "Tax Payable: $" + taxPayable.ToString()));
doc.Close();
}

}

希望这能对你有所帮助。

Answer 2

让我们简单一点。
通常，您希望用户选择文件夹，而不是文件位置。
因此，您应该使用FolderBrowserDialog，而不是使用OpenFileDialog。获取文件夹后，使用Path.Combine将文件名和文件夹名组合为一个完整的路径。