C#实现文件与二进制互转并存入数据库

这篇文章主要介绍了C#实现文件与二进制互转并存入数据库,本文直接给出代码实例,代码中包含详细注释,需要的朋友可以参考下

//这个方法是浏览文件对象

private void button1_Click(object sender, EventArgs e)

{

//用户打开文件浏览

using (OpenFileDialog dialog = new OpenFileDialog())

{

//只能单选一个文件

dialog.Multiselect = false;

//选择一个文件

if (dialog.ShowDialog() == DialogResult.OK)

{

try

{

//把选择的文件路径给txtPath

this.textBox1.Text = dialog.FileName;

}

catch (Exception ex)

{

//抛出异常

throw (ex);

}

//关闭

private void button3_Click(object sender, EventArgs e)

{

this.Close();

}

//把文件转成二进制流出入数据库

private void button2_Click(object sender, EventArgs e)

{

FileStream fs = new FileStream(textBox1.Text, FileMode.Open);

BinaryReader br = new BinaryReader(fs);

Byte[] byData = br.ReadBytes((int)fs.Length);

fs.Close();

string conn = "server=.;database=testDB;Uid=sa;Pwd=sa ";

SqlConnection myconn = new SqlConnection(conn);

myconn.Open();

string str = "insert into pro_table (pro_name,pro_file) values('测试文件',@file)";

SqlCommand mycomm = new SqlCommand(str, myconn);

mycomm.Parameters.Add("@file", SqlDbType.Binary, byData.Length);

mycomm.Parameters["@file"].Value = byData;

mycomm.ExecuteNonQuery();

myconn.Close();

}

//从数据库中把二进制流读出写入还原成文件

private void button4_Click(object sender, EventArgs e)

{

string conn = "server=.;database=testDB;Uid=sa;Pwd=sa ";

string str = "select pro_file from pro_table where pro_name='测试文件' ";

SqlConnection myconn = new SqlConnection(conn);

SqlDataAdapter sda = new SqlDataAdapter(str, conn);

DataSet myds = new DataSet();

myconn.Open();

sda.Fill(myds);

myconn.Close();

Byte[] Files = (Byte[])myds.Tables[0].Rows[0]["pro_file"];

BinaryWriter bw = new BinaryWriter(File.Open("D:\\2.rdlc",FileMode.OpenOrCreate));

bw.Write(Files);

bw.Close();

}

巴特西

C#实现文件与二进制互转并存入数据库

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