Question

我想知道如何在SQL Server表中创建一个图像列，并使用VB.NET在ASP.NET中检索它

create table Tbl(ID int primary key,Name varchar(20),Image ....)

Answer 1

您想使用VARBINARY(MAX)存储此数据。

关于代码方，here is a good, brief answer.

答案：

FileStream st = new FileStream(@"C:\filename.jpg", FileMode.Open);
byte[] buffer = new byte[st.Length];
st.Read(buffer, 0, (int)st.Length);
st.Close();

SqlConnection conn = new SqlConnection("...");
SqlCommand cmd = new SqlCommand(
    "UPDATE SomeTable SET image=@image WHERE ID = 1", conn);
cmd.Parameters.AddWithValue("@image", buffer);
conn.Open();
int i = cmd.ExecuteNonQuery();
conn.Close();

Answer 2

Save and Retrieve Files from SQL Server Database using ASP.Net

Storing and Retrieving Images/Files In Sql Server - VB.NET

Answer 3

在sql server中创建类型为image的列。在asp中，使用这个示例代码:(它在c＃中）

    string con = "your connection string"
    var Image =  (from A in YourTblImage
                  select A).First();//to get one record of the table use the `first`
    FileStream fs = new FileStream(@"yourPath to save the image", FileMode.Create);
    try
    {

        System.Data.Linq.Binary img = image.imageColumnName;
        byte[] imageK = img.ToArray();
        fs.Write(imageK, 0, imageK.Length);
    }
    catch (Exception ex)
    {
        string str = ex.Message;
    }
    finally
    {
        fs.Close();
    }

如何在SQL Server表中创建图像列，并使用VB在ASP.NET中检索它

3 个答案: