二进制sqlserver,二进制转换器

怎样在sqlserver2008中用sql语句操作二进制数据

怎样在sqlserver2008中用sql语句操作二进制数据

sqlserver之二进制和字符串sql语句

正常情况下我们对数据库的操作就是如下的写法来操作数据库

SELECT TOP 10 ID AS 编号,BookName AS 书名 FROM dbo.books ORDER BY ID;

UPDATE dbo.books SET BookName='新的书名' WHERE ID=1233;

DELETE FROM dbo.books WHERE ID=122

相关问答

Q1: Sqlserver数据库存储的图片格式(二进制数据)怎么显示到页面？

1.将图片以二进制存入数据库

//保存图片到数据库

protected void Button1_Click(object sender, EventArgs e)

{

//图片路径

string strPath = "~/photo/03.JPG";

string strPhotoPath = Server.MapPath(strPath);

//读取图片

FileStream fs = new System.IO.FileStream(strPhotoPath, FileMode.Open, FileAccess.Read);

BinaryReader br = new BinaryReader(fs);

byte[] photo = br.ReadBytes((int)fs.Length);

br.Close();

fs.Close();

//存入

SqlConnection myConn = new SqlConnection("Data Source=127.0.0.1;Initial Catalog=TestDB;User ID=sa;Password=sa");

string strComm = " INSERT INTO personPhoto(personName, personPhotoPath, personPhoto) ";

strComm += " VALUES('wangwu', '" + strPath + "', @photoBinary )";

SqlCommand myComm = new SqlCommand(strComm, myConn);

myComm.Parameters.Add("@photoBinary", SqlDbType.Binary,photo.Length);

myComm.Parameters["@photoBinary"].Value = photo;

myConn.Open();

myComm.ExecuteNonQuery();

myConn.Close();

}

2.读取二进制图片在页面显示

//读取图片

SqlConnection myConn = new SqlConnection("Data Source=127.0.0.1;Initial Catalog=TestDB;User ID=sa;Password=sa");

string strComm = " SELECT personPhoto FROM personPhoto WHERE personName='wangwu' ";

SqlCommand myComm = new SqlCommand(strComm, myConn);

myConn.Open();

SqlDataReader dr = myComm.ExecuteReader();

while (dr.Read())

{

byte[] photo = (byte[])dr["personPhoto"];

this.Response.BinaryWrite(photo);

}

dr.Close();

myConn.Close();

或

SqlConnection myConn = new SqlConnection("Data Source=127.0.0.1;Initial Catalog=TestDB;User ID=sa;Password=sa");

SqlDataAdapter myda = new SqlDataAdapter(" SELECT personPhoto FROM personPhoto WHERE personName='11' ", myConn);

DataSet myds = new DataSet();

myConn.Open();

myda.Fill(myds);

myConn.Close();

byte[] photo = (byte[])myds.Tables[0].Rows[0]["personPhoto"];

this.Response.BinaryWrite(photo);

3.设置Image控件显示从数据库中读出的二进制图片

---------------------------------------------

SqlConnection myConn = new SqlConnection("Data Source=192.168.0.1;Initial Catalog=TestDB;User ID=sa;Password=sa");

SqlDataAdapter myda = new SqlDataAdapter(" SELECT personPhoto FROM personPhoto WHERE personName='11' ", myConn);

DataSet myds = new DataSet();

myConn.Open();

myda.Fill(myds);

myConn.Close();

byte[] photo = (byte[])myds.Tables[0].Rows[0]["personPhoto"];

//图片路径

string strPath = "~/photo/wangwu.JPG";

string strPhotoPath = Server.MapPath(strPath);

//保存图片文件

BinaryWriter bw = new BinaryWriter(File.Open(strPhotoPath,FileMode.OpenOrCreate));

bw.Write(photo);

bw.Close();

3.显示图片

this.Image1.ImageUrl = strPath;

4.GridView中ImageField以URL方式显示图片

--------------------------

asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"

Columns

asp:BoundField DataField="personName" HeaderText="姓名" /

asp:ImageField DataImageUrlField="personPhotoPath"

HeaderText="图片"

/asp:ImageField

/Columns

/asp:GridView

5.GridView显示读出的二进制图片

//样板列

asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" OnRowDataBound="GridView1_RowDataBound"

Columns

asp:BoundField DataField="personName" HeaderText="姓名" /

asp:ImageField DataImageUrlField="personPhotoPath"

HeaderText="图片"

/asp:ImageField

asp:TemplateField HeaderText="图片"

ItemTemplate

asp:Image ID="Image1" runat="server" /

/ItemTemplate

/asp:TemplateField

/Columns

/asp:GridView

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)

{

if (e.Row.RowIndex 0)

return;

// System.ComponentModel.Container

string strPersonName = (string)DataBinder.Eval(e.Row.DataItem, "personName");

Image tmp_Image = (Image)e.Row.Cells[2].FindControl("Image1");

if (!System.Convert.IsDBNull(DataBinder.Eval(e.Row.DataItem, "personPhoto")))

{

//

byte[] photo = (byte[])DataBinder.Eval(e.Row.DataItem, "personPhoto");

//图片路径

string strPath = "~/photo/" + strPersonName.Trim() + ".JPG";

string strPhotoPath = Server.MapPath(strPath);

//保存图片文件

BinaryWriter bw = new BinaryWriter(File.Open(strPhotoPath, FileMode.OpenOrCreate));

bw.Write(photo);

bw.Close();

//显示图片

tmp_Image.ImageUrl = strPath;

}

}

Q2: sqlserver二进制日志恢复

目前SqlServer没有单表恢复，相对於oracle确实是一个不太方便的事情。

你可以将数据恢复到一个新数据库，然後将误删的数据插入到目前A表中，这样就不会影响其他数据了。

Q3: SQLServer存储二进制图片用什么类型

存储图片:以二进制的形式存储图片时，要把数据库中的字段设置为Image数据类型(SQL Server),存储的数据是Byte[]

Q4: sqlserver如何用二进制保存mp3文件

先程序中把MP3文件读取为byte数组，然后就可以保存到数据库中二进制字段VARBINARY(max)中

求采纳

Q5: 在SQL Server中，共使用了3种数据类型来存储二进制数据，分别是______、______、

主要涉及 binary varbinary  image 这三个字段类型吧

请仔细了解sqlserver 各种数据类型

sql二进制数据类型详解

如有疑问，及时沟通！