执行SQL查询时显示进度条

我想在从SQL数据库中读取数据时通知用户，我决定创建一个带有进度条的表单，但它不起作用 – 可能是因为需要一个线程。 我想以编程方式创建表单

ProgressBar pb = new ProgressBar(); pb.MarqueeAnimationSpeed = 30; pb.Style = ProgressBarStyle.Marquee; pb.Dock = DockStyle.Fill; progressForm.ClientSize = new Size(200, 50); progressForm.FormBorderStyle = FormBorderStyle.FixedDialog; progressForm.StartPosition = FormStartPosition.CenterScreen; progressForm.Controls.Add(pb); progressForm.ControlBox = false; progressForm.TopMost = true; progressForm.Show(); //do data processes here (all queries and executes) progressForm.close(); 

如何修改上面的代码以实现我的既定目标？

编辑：顺便说一下，我想在项目的每个数据函数中使用这个进度条表单。 例如：fillGrid，runQuery ..

@Will非常感谢你的回答。 我的意思是我如何使用类的函数，例如我的gridFill函数在该连接类中：

  class ConnectionClass { public static SqlConnection connection = new SqlConnection(); public string sorgu; public static string server; public static string userId; public static string catalog; public static string password; public static string accessMethod; public DataSet ds = new DataSet(); Form progressForm = new Form(); public bool Open() { try { if (connection.State != ConnectionState.Open) { connection.ConnectionString = "Data Source = " + server + ";" + "Initial Catalog=" + catalog + ";" + "User ID=" + userId + ";" + "Password=" + password + ";" + "Connect Timeout=0"; connection.Open(); return true; } else { return true; } } catch (Exception ex) { MessageBox.Show("System message:" + ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error); return false; } } public DataTable Dt(string query) { DataTable dt = new DataTable(); if (Open()) { SqlDataAdapter da = new SqlDataAdapter(query, connection); try { //progressForm.Showdialog() is this possible??? da.Fill(dt); //progressForm.close(); ?? } catch (Exception ex) { MessageBox.Show("Sistem Mesajı:" + ex.Message, "Hata", MessageBoxButtons.OK, MessageBoxIcon.Error); } } return dt; } public bool Run(string query, string hataMsj) { Form activeForm = Form.ActiveForm; query = " SET DATEFORMAT DMY " + query; SqlCommand sc = new SqlCommand(query, connection); try { Open(); sc.ExecuteNonQuery(); return true; } catch (Exception ) { return false; } } public void fillComboBox(string sorgu, ComboBox cb, string text, string value) { DataTable dt = Dt(sorgu); cb.DisplayMember = text; cb.ValueMember = value; cb.DataSource = dt; if (cb.Items.Count > 0) { cb.SelectedIndex = 0; } } public int fillGridView(string sorgu, DataGridView dgv) { DataTable dtGrvw = Dt(sorgu); dgv.DataSource = dtGrvw; return 1; } } 

来自另一个表单（类）的示例查询

  ConnectionClass cc = new ConnectionClass(); query= " INSERT INTO tblPersonel (" + " [sqlUserName] " + ",[personelNo] " + ",[ad] " + ",[soyad] " + ",[departmanId] " + ",[emailadres] " + ",[tcKimlikNo],[kangurubu],[dokumaciNo])VALUES" + "('" + tbSqlUserName.Text + "','" + tbPersonelNo.Text + "','" + tbAd.Text + "','" + tbSoyad.Text + "','" + cbDepartman.SelectedValue.ToString() + "','" + tbMail.Text + "','" + tbKimlikno.Text + "','" + tbKangrubu.Text + "','" + tbDokumaciNo.Text + "' ) "; if (cc.Run(query, "Unexpected error on insert new person")) { fillGrid(); this.Close(); } public void fillGrid() { query= " select * from View_Personel order by personelNo desc"; cc.fillGridView(query, gridviewPersonel); } 

我无法想象如何在bw_DoWork事件中使用它。 因为我的函数有参数。（查询，gridview）当我从另一个类调用它时我可以使用参数…

ps： 这个方法对我来说非常好，但它没有用。 我不明白这个问题

Answer 1

使用BackgroundWorker类填充DataGrid。

  Form progressForm; public void func() { BackgroundWorker bw = new BackgroundWorker (); bw.DoWork += new DoWorkEventHandler (bw_DoWork); bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler (bw_RunWorkerCompleted); progressForm = new Form (); ProgressBar pb = new ProgressBar (); pb.MarqueeAnimationSpeed = 30; pb.Style = ProgressBarStyle.Marquee; pb.Dock = DockStyle.Fill; progressForm.ClientSize = new Size (200, 50); progressForm.FormBorderStyle = FormBorderStyle.FixedDialog; progressForm.StartPosition = FormStartPosition.CenterScreen; progressForm.Controls.Add (pb); progressForm.ControlBox = false; progressForm.TopMost = true; progressForm.Show (); string queryString = "SELECT ...."; // fill query string here var params = new KeyValuePair(sorgu, queryString); bw.RunWorkerAsync (params); } void bw_DoWork (object sender, DoWorkEventArgs e) { KeyValuePair params = e.Argument as KeyValuePair; ConnectionClass cc = new Connection Class(); cc.fillGrid(params.Value, params.Key); } void bw_RunWorkerCompleted (object sender, RunWorkerCompletedEventArgs e) { progressForm.Close (); // } 

可以将参数发送到BackgroundWorker。 如果需要多个参数，可以发送包含所需对象的元组。

编辑：如果你在3.5，你可以使用KeyValuePair。 代码已更新。

Answer 2

就像Ash Burlaczenko推荐的那样，你必须为此目的使用BackgroundWorker 。

但是，由于您希望将其与ProgressBar绑定，我建议您查看CodeProject上的这篇文章： ProgressWorker 。

它相当容易使用，它会自动为您更新进度条。 您所要做的就是记住不时调用ProgressWorker.ReportProgress方法以更新相关的进度条。