C# Devart.Data.Oracle（开发人员如何使用）

using Devart.Data.Oracle;
class Program
{
    static void Main()
    {
        var connectionString = "User Id=myUsername;Password=myPassword;Server=myServer;";
        using (var connection = new OracleConnection(connectionString))
        {
            connection.Open();
            using (var command = new OracleCommand("SELECT * FROM myTable", connection))
            {
                using (OracleDataReader reader = command.ExecuteReader())
                {
                    while (reader.Read())
                    {
                        Console.WriteLine(reader["myColumn"].ToString());
                    }
                }
            }
        }
    }
}

Imports Devart.Data.Oracle
Friend Class Program
	Shared Sub Main()
		Dim connectionString = "User Id=myUsername;Password=myPassword;Server=myServer;"
		Using connection = New OracleConnection(connectionString)
			connection.Open()
			Using command = New OracleCommand("SELECT * FROM myTable", connection)
				Using reader As OracleDataReader = command.ExecuteReader()
					Do While reader.Read()
						Console.WriteLine(reader("myColumn").ToString())
					Loop
				End Using
			End Using
		End Using
	End Sub
End Class

var connectionString = "User Id=myUsername; Password=myPassword; Direct=True; Server=myServer;";
using (var connection = new OracleConnection(connectionString))
{
    connection.Open();
    // Use the connection
}

Dim connectionString = "User Id=myUsername; Password=myPassword; Direct=True; Server=myServer;"
Using connection = New OracleConnection(connectionString)
	connection.Open()
	' Use the connection
End Using

// Example assumes EF Core setup
using (var context = new MyDbContext())
{
    var data = context.MyEntities.Where(e => e.Property > 0).ToList();
    foreach (var item in data)
    {
        Console.WriteLine(item.Name);
    }
}

' Example assumes EF Core setup
Using context = New MyDbContext()
	Dim data = context.MyEntities.Where(Function(e) e.Property > 0).ToList()
	For Each item In data
		Console.WriteLine(item.Name)
	Next item
End Using

using (var connection = new OracleConnection(connectionString))
{
    connection.Open();
    using (var bulkCopy = new OracleBulkCopy(connection))
    {
        bulkCopy.DestinationTableName = "targetTable";
        bulkCopy.WriteToServer(dataTable);
    }
}

Using connection = New OracleConnection(connectionString)
	connection.Open()
	Using bulkCopy = New OracleBulkCopy(connection)
		bulkCopy.DestinationTableName = "targetTable"
		bulkCopy.WriteToServer(dataTable)
	End Using
End Using

using (var connection = new OracleMonitor() { IsActive = true })
{
    // Perform database operations
}

Using connection = New OracleMonitor() With {.IsActive = True}
	' Perform database operations
End Using

using (var context = new MyDbContext())
{
    var query = from e in context.MyEntities
                where e.PropertyName == "Value"
                select e;
    foreach (var item in query)
    {
        Console.WriteLine(item.Property);
    }
}

Using context = New MyDbContext()
	Dim query = From e In context.MyEntities
		Where e.PropertyName = "Value"
		Select e
	For Each item In query
		Console.WriteLine(item.Property)
	Next item
End Using

using IronPdf;

class Program
{
    static void Main(string[] args)
    {
        var renderer = new ChromePdfRenderer();

        // 1. Convert HTML String to PDF
        var htmlContent = "<h1>Hello, IronPDF!</h1><p>This is a PDF from an HTML string.</p>";
        var pdfFromHtmlString = renderer.RenderHtmlAsPdf(htmlContent);
        pdfFromHtmlString.SaveAs("HTMLStringToPDF.pdf");

        // 2. Convert HTML File to PDF
        var htmlFilePath = "path_to_your_html_file.html"; // Specify the path to your HTML file
        var pdfFromHtmlFile = renderer.RenderHtmlFileAsPdf(htmlFilePath);
        pdfFromHtmlFile.SaveAs("HTMLFileToPDF.pdf");

        // 3. Convert URL to PDF
        var url = "http://ironpdf.com"; // Specify the URL
        var pdfFromUrl = renderer.RenderUrlAsPdf(url);
        pdfFromUrl.SaveAs("URLToPDF.pdf");
    }
}

Imports IronPdf

Friend Class Program
	Shared Sub Main(ByVal args() As String)
		Dim renderer = New ChromePdfRenderer()

		' 1. Convert HTML String to PDF
		Dim htmlContent = "<h1>Hello, IronPDF!</h1><p>This is a PDF from an HTML string.</p>"
		Dim pdfFromHtmlString = renderer.RenderHtmlAsPdf(htmlContent)
		pdfFromHtmlString.SaveAs("HTMLStringToPDF.pdf")

		' 2. Convert HTML File to PDF
		Dim htmlFilePath = "path_to_your_html_file.html" ' Specify the path to your HTML file
		Dim pdfFromHtmlFile = renderer.RenderHtmlFileAsPdf(htmlFilePath)
		pdfFromHtmlFile.SaveAs("HTMLFileToPDF.pdf")

		' 3. Convert URL to PDF
		Dim url = "http://ironpdf.com" ' Specify the URL
		Dim pdfFromUrl = renderer.RenderUrlAsPdf(url)
		pdfFromUrl.SaveAs("URLToPDF.pdf")
	End Sub
End Class

using Devart.Data.Oracle;
using IronPdf;
using System;
class Program
{
    static void Main(string[] args)
    {
        // Connection string to Oracle Database
        var oracleConnectionString = "User Id=your_user;Password=your_password;Direct=True;Sid=your_sid;Server=your_server;";
        // SQL query to fetch data
        var sqlQuery = "SELECT * FROM SalesReport";
        // Initialize the Oracle connection
        using (var oracleConnection = new OracleConnection(oracleConnectionString))
        {
            oracleConnection.Open();
            // Execute the query
            using (var oracleCommand = new OracleCommand(sqlQuery, oracleConnection))
            {
                using (var reader = oracleCommand.ExecuteReader())
                {
                    // Here you would normally process your data. For simplicity, let's assume it's just a string of HTML.
                    var htmlContent = "<h1>Sales Report</h1><p>Generated on " + DateTime.Now + "</p>";
                    while (reader.Read())
                    {
                        // Append data from the reader to the HTML content
                        htmlContent += $"<p>{reader["ItemName"]} - {reader["SaleAmount"]}</p>";
                    }
                    // Now, let's create a PDF from the HTML content
                    var renderer = new ChromePdfRenderer();
                    var pdf = renderer.RenderHtmlAsPdf(htmlContent);
                    // Save the PDF to a file
                    pdf.SaveAs("SalesReport.pdf");
                }
            }
        }
        Console.WriteLine("PDF generated successfully.");
    }
}

Imports Devart.Data.Oracle
Imports IronPdf
Imports System
Friend Class Program
	Shared Sub Main(ByVal args() As String)
		' Connection string to Oracle Database
		Dim oracleConnectionString = "User Id=your_user;Password=your_password;Direct=True;Sid=your_sid;Server=your_server;"
		' SQL query to fetch data
		Dim sqlQuery = "SELECT * FROM SalesReport"
		' Initialize the Oracle connection
		Using oracleConnection As New OracleConnection(oracleConnectionString)
			oracleConnection.Open()
			' Execute the query
			Using oracleCommand As New OracleCommand(sqlQuery, oracleConnection)
				Using reader = oracleCommand.ExecuteReader()
					' Here you would normally process your data. For simplicity, let's assume it's just a string of HTML.
					Dim htmlContent = "<h1>Sales Report</h1><p>Generated on " & DateTime.Now & "</p>"
					Do While reader.Read()
						' Append data from the reader to the HTML content
						htmlContent &= $"<p>{reader("ItemName")} - {reader("SaleAmount")}</p>"
					Loop
					' Now, let's create a PDF from the HTML content
					Dim renderer = New ChromePdfRenderer()
					Dim pdf = renderer.RenderHtmlAsPdf(htmlContent)
					' Save the PDF to a file
					pdf.SaveAs("SalesReport.pdf")
				End Using
			End Using
		End Using
		Console.WriteLine("PDF generated successfully.")
	End Sub
End Class