小编XiA*_*AnG的帖子

我正在尝试调整我使用FileUpload控件上传的jpg图像,并在将其保存到数据库(SQL Server 2008)之前将其转换为byte(varbinary(MAX)).我所做的和下面的代码显示我设法将其转换为字节并作为varbinary(MAX)保存到数据库中.我想知道如何在完成所有这些功能之前调整图像大小.帮帮我吧 谢谢!

阅读文件

string filePath = FileUpload1.PostedFile.FileName;
string filename = Path.GetFileName(filePath);
string ext = Path.GetExtension(filename);

根据文件扩展名设置contenttype

string contenttype = String.Empty;            
switch (ext)
{
   case ".jpg":
   contenttype = "image/jpg";
   break;
}

转换为字节并使用varbinary保存到数据库中

if (contenttype != String.Empty)
{
            Stream fs = FileUpload1.PostedFile.InputStream;

            BinaryReader br = new BinaryReader(fs);

            Byte[] bytes = br.ReadBytes((Int32)fs.Length);

            //insert the file into database
            string strQuery = "insert into MemberReport(username, typeofcrime, location, crdatetime, citizenreport, image1, image2, image3, image4, image5)" +
               " values ('" + username + "','" + …

我试图更新我的个人资料,但它在更新时不断捕获旧数​​据.可以做些什么来解决这个问题.请帮我解决这个问题谢谢!

protected void Page_Load(object sender, EventArgs e)
{

    String nric = (String)Session["nric"];

    SqlConnection con = new SqlConnection("Data Source = localhost; Initial Catalog = MajorProject; Integrated Security= SSPI");
    con.Open();
    SqlCommand cm = new SqlCommand("Select * from MemberAccount where nric = '" + nric + "'", con);
    SqlDataReader dr;
    dr = cm.ExecuteReader();
    if (dr.Read())
    {
        txtFullName.Text = dr["fullname"].ToString();
        txtAddress.Text = dr["address"].ToString();
        txtContact.Text = dr["contact"].ToString();
        txtEmail.Text = dr["email"].ToString();
    }

    con.Close();

}

protected void btnUpdate_Click(object sender, EventArgs e)
{
    String nric = (String)Session["nric"];

    if …

我Page_Load点击后试图调用方法btnSubmit.对于我,Page_Load我在dropdownlist框中的列上进行了数据绑定caseprogress != 'ongoing'.然后我为btnSubmit_Click我插入一些数据到另一个表,更新caseprogress = 'completed'和调用Page_Load方法.但我的下拉列表框似乎并不重新绑定.(除非我刷新页面)我尝试在其他页面上使用此方法,但不适用于此.仅供参考我在此页面中没有任何更新面板.同样适用于正在工作的另一个.

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        //Bind data to Dropdownlist box
    }
}

protected void btnSubmit_Click(object sender, EventArgs e)
{
    //Insert / Update data of sql data table

   Page_Load(null, EventArgs.Empty);
}