Question

我正在设计我的网页，图像存储在我的数据库中（该项目是Photostudio管理系统）

我的代码：

 using System;
 using System.Collections;
 using System.Configuration;
 using System.Data;
 using System.Linq;
 using System.Web;
 using System.Web.Security;
 using System.Web.UI;
 using System.Web.UI.HtmlControls;
 using System.Web.UI.WebControls;
 using System.Web.UI.WebControls.WebParts;
 using System.Xml.Linq;
 using System.Data.SqlClient;

 namespace photoshops
   {
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            SqlDataAdapter da = new SqlDataAdapter();
            SqlConnection cnn = new SqlConnection();
            DataSet ds = new DataSet();
            string constr = null;
            SqlCommand cmd = new SqlCommand();
            if (IsValid != true )
            {
                constr = @"Data Source=DEVI\SQLEXPRESS;Initial Catalog =cat; Integrated 
                                             Security=SSPI";
                cnn.ConnectionString = constr;
                try
                {
                    if (cnn.State != ConnectionState.Open)
                        cnn.Open();



                }
                catch (Exception ex)
                {
                    string str1 = null;
                    str1 = ex.ToString();
                }
                cmd.Connection = cnn;
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.CommandText = "photoset";
                cmd.Parameters.Clear();
                cmd.Parameters.AddWithValue("@BillNo", TextBox1.Text);
                cmd.Parameters.AddWithValue("@CustomerName", TextBox2.Text);
                cmd.Parameters.AddWithValue("@Address", TextBox3.Text);
                cmd.Parameters.AddWithValue("@StartDate",Rdbsdate.SelectedDate );
                cmd.Parameters.AddWithValue("@EndDate", Rdbddate.SelectedDate );
                SqlParameter param0 = new SqlParameter("@Systemurl", SqlDbType.VarChar,  
                                  50);

                cmd.Parameters.AddWithValue("@Numberofcopies", TextBox7.Text);
                cmd.Parameters.AddWithValue("@Amount", TextBox8.Text);
                cmd.Parameters.AddWithValue("@Total", TextBox9.Text);
                da.SelectCommand = cmd;
                try
                {
                    da.Fill(ds);
                }
                catch (Exception ex)
                {
                    string strErrMsg = ex.Message;
                    //throw new applicationException("!!!! An error an occured while 
                     //inserting record."+ex.Message)
                }
                finally
                {
                    da.Dispose();
                    cmd.Dispose();
                    cnn.Close();
                    cnn.Dispose();
                }
                if (ds.Tables.Count > 0)
                {

                    if (ds.Tables[0].Rows.Count > 0)
                    {
                        Msg.Text = "Photo setting sucessfullY";
                    }
                    else
                    {
                        Msg.Text = "photosetting failled";
                    }
                }
            }
        }
    }
  }

我的错误记录未存储，图像未存储如何更改我的代码。

Answer 1

首先，您没有保存图像，而是保存计算机的路径。您需要保存照片的字节数组。

简而言之：上传其上传控件，您可以在其中选择图像在你上传照片的二进制内容的字节arrey 然后你只将它作为一个简单的参数发送cmd.Parameters.Add（“@ pic”，pic）;

public void OnUpload(Object sender, EventArgs e)
{
    // Create a byte[] from the input file

    int len = Upload.PostedFile.ContentLength; 
    byte[] pic = new byte[len];
    Upload.PostedFile.InputStream.Read (pic, 0, len);
    // Insert the image and comment into the database

    SqlConnection connection = new 
      SqlConnection (@"server=INDIA\INDIA;database=iSense;uid=sa;pwd=india");
    try
    {
        connection.Open ();
         SqlCommand cmd = new SqlCommand ("insert into Image " 
          + "(Picture, Comment) values (@pic, @text)", connection);
         cmd.Parameters.Add ("@pic", pic);
         cmd.Parameters.Add ("@text", Comment.Text);
         cmd.ExecuteNonQuery ();
     }
     finally 
     {
        connection.Close ();
     }
 }

这里有一些教程，第一个链接非常简单，代码很简单 http://www.codeproject.com/KB/web-image/PicManager.aspx

另一个，以防万一： http://www.redmondpie.com/inserting-in-and-retrieving-image-from-sql-server-database-using-c/

主要资源：http://www.codeproject.com/KB/web-image/PicManager.aspx

Asp.net如何纠正错误

1 个答案: