c#中处理关于SQL中BLOG大数据的方法

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Data.Sql;
using System.IO;

namespace dbBlog
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{
SqlConnectionStringBuilder connBuilder = new SqlConnectionStringBuilder();
connBuilder.DataSource = "localhost";
connBuilder.InitialCatalog = "northwind";
connBuilder.IntegratedSecurity = true;

using (SqlConnection conn = new SqlConnection(connBuilder.ToString()))
{
try
{
conn.Open();
SqlCommand command = new SqlCommand();
command.Connection = conn;
command.CommandText = "select firstname,lastname from employees";
using (SqlDataReader dataReader = command.ExecuteReader())
{
while (dataReader.Read())
{
lbxImage.Items.Add(dataReader[0]+"  ");
}
}
}
catch(Exception ex)
{
Console.WriteLine(ex.Message);
}
}
}

private void lbxImage_SelectedIndexChanged(object sender, EventArgs e)
{
if (lbxImage.SelectedIndex == -1)
{
return;
}
SqlConnectionStringBuilder connBuilder = new SqlConnectionStringBuilder();
connBuilder.DataSource = "localhost";
connBuilder.InitialCatalog = "northwind";
connBuilder.IntegratedSecurity = true;

using (SqlConnection conn = new SqlConnection(connBuilder.ToString()))
{
try
{
conn.Open();
SqlCommand command = new SqlCommand();
command.Connection = conn;
command.CommandText = "select firstName,lastName,photo from employees where firstName+' '+lastname=@name";
string name = lbxImage.SelectedItem.ToString();
command.Parameters.Add("@name",SqlDbType.NVarChar,100).Value=name;
using (SqlDataReader dataReader = command.ExecuteReader(CommandBehavior.CloseConnection|CommandBehavior.SingleResult))
{
if (dataReader.Read())
{
String firstname = dataReader.GetString(0);
System.Data.SqlTypes.SqlBytes bytes = dataReader.GetSqlBytes(2);
try
{
pbxImage.Image = Image.FromStream(bytes.Stream);
}
//lbxImage.Items.Add(dataReader[0] + "  ");
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}

}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}

MessageBox.Show("123");
}

private void pbxImage_Click(object sender, EventArgs e)
{

}
}
}