本地图片插入到SQL Server中以及SQL Server中的导出图片

1. 建立数据库及数据库表

CREATE table MyTable(
id int identity(1,1) primary key ,
imageInfo IMAGE NULL
)

2. 建立C#项目及准备图片

3. 代码示例

public void InsertImageToDataBase()
{
using (FileStream fs = File.OpenRead("pic.png"))
{
byte[] imageBytes = new byte[fs.Length];
fs.Read(imageBytes, 0, Convert.ToInt32(fs.Length));
string str = "insert into mytest(imageInfo) values(@imgfile)";
SqlParameter parameter = new SqlParameter("@imgfile",imageBytes);
int result = SqlHelper.ExecuteNonQuery(str, CommandType.Text, parameter);
if (result > 0)
{
MessageBox.Show("导入成功");
}

}
}

public void FromDataBaseToImage()
{
string sql = "select * from mytest";
using (SqlDataReader reader = SqlHelper.ExecuteReader(sql,CommandType.Text))
{
if (reader.HasRows)
{
while(reader.Read())
{
byte[] imageBytes = (byte[])reader[1];
int arraySize = imageBytes.GetUpperBound(0);
//将Excel写入文件、
using (FileStream fsWrite = File.OpenWrite("11.png"))
{
fsWrite.Write(imageBytes, 0, arraySize);
}

}
}
}
MessageBox.Show("关闭");
}