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{
public partial class jszg_upload : Form
{
static bool stop_flag = false;
public jszg_upload()
{
InitializeComponent();
}
private void upload_button1_Click(object sender, EventArgs e)
{
stop_flag = false;
if (this.checkBox1.Checked)
{
String connectionString = "連接串";
using (SqlConnection conn = new SqlConnection(connectionString))
{
conn.Open();
SqlCommand cmd = new SqlCommand(" update my_jszg set filemime=null, filebody = null", conn);
cmd.ExecuteNonQuery();
conn.Close();
}
}
new Thread(uploadImageToDB).Start();
}//end upload_button1_Click
void uploadImageToDB()
{
//第一步：發(fā)現(xiàn)文件夾下面的文件及數(shù)量
DirectoryInfo myFolder = new DirectoryInfo("bcd");
FileInfo[] myFiles = myFolder.GetFiles();
this.richTextBox1.Text = "從文件夾中發(fā)現(xiàn)了：" + myFiles.Length.ToString() + " 個(gè)文件！" + "/n";
this.jindutiao_progressBar1.Maximum = myFiles.Length;
//第二步：開(kāi)始上傳文件
String connectionString = "連接串";
using (SqlConnection conn = new SqlConnection(connectionString))
{
conn.Open();
for (int i = 0; i < myFiles.Length; i++)
{
if(stop_flag)
break;
//進(jìn)度條
this.jindutiao_progressBar1.Value = i + 1;
this.pictureBox1.ImageLocation = myFiles[i].FullName;
this.richTextBox1.Text = myFiles[i].Name + "/n" + this.richTextBox1.Text;
this.baifenbi_label1.Text = ((((i + 1) * 1.0) /myFiles.Length) * 100) + "%";
//上傳實(shí)際的數(shù)據(jù)image/jpeg
SqlCommand cmd = new SqlCommand(" update my_jszg set filemime='image/jpeg', filebody = @myfilebody from my_jszg where 證件號(hào)碼=@myzjhm", conn);
byte[] fb = new byte[myFiles[i].Length];
BinaryReader br = new BinaryReader(myFiles[i].OpenRead());
br.Read(fb, 0, (int)myFiles[i].Length);
cmd.Parameters.AddWithValue("@myfilebody", fb);
cmd.Parameters.AddWithValue("@myzjhm", myFiles[i].Name.Substring(0, myFiles[i].Name.LastIndexOf('.')));
cmd.ExecuteNonQuery();
br.Close();
}//end for
conn.Close();
}
MessageBox.Show("所有的文件上傳完畢！");
}
//停止上傳
private void stop_button_Click(object sender, EventArgs e)
{
stop_flag=true;
}
}
}
在此代碼中，對(duì)一個(gè)控件的訪(fǎng)問(wèn)如： this.richTextBox1.Text = myFiles[i].Name + "/n" + this.richTextBox1.Text; 僅限在一個(gè)線(xiàn)程中，如果在兩個(gè)進(jìn)程中對(duì)控件訪(fǎng)問(wèn)將會(huì)出錯(cuò)！如不能在程序自己的線(xiàn)程 和 uploadImageToDB 線(xiàn)程中訪(fǎng)問(wèn)。
AspNet技術(shù)：關(guān)于.net(C#)中的跨進(jìn)程訪(fǎng)問(wèn)的問(wèn)題，轉(zhuǎn)載需保留來(lái)源！
鄭重聲明：本文版權(quán)歸原作者所有，轉(zhuǎn)載文章僅為傳播更多信息之目的，如作者信息標(biāo)記有誤，請(qǐng)第一時(shí)間聯(lián)系我們修改或刪除，多謝。
