C# 在执行SQL查询时显示progressbar
我想在从SQL数据库读取数据时通知用户 我决定用progressbar创建一个表单,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C# 在执行SQL查询时显示progressbar,c#,sql,multithreading,progress-bar,backgroundworker,C#,Sql,Multithreading,Progress Bar,Backgroundworker,我想在从SQL数据库读取数据时通知用户 我决定用progressbar创建一个表单,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; prog
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();
我如何修改上面的代码以实现我的既定目标
编辑:顺便说一句,我想在我的项目中的每个数据函数中使用这个progressbar表单。例如:fillGrid、runQuery
@非常感谢您的回答。我的意思是如何使用类的函数,例如,我的gridFill函数位于该连接类中:
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;
}
}
以及来自其他表单(类)的示例查询
我无法想象我如何在bw_DoWork活动中使用它。因为我的函数有参数。(查询,gridview)当我从另一个类调用它时,我可以将它与参数一起使用
p、 对我来说这很好,但没用。我不理解这个问题使用BackgroundWorker类填充数据网格
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<GridControl, string>(sorgu, queryString);
bw.RunWorkerAsync (params);
}
void bw_DoWork (object sender, DoWorkEventArgs e) {
KeyValuePair<GridControl, string> params = e.Argument as KeyValuePair<GridControl, string>;
ConnectionClass cc = new Connection Class();
cc.fillGrid(params.Value, params.Key);
}
void bw_RunWorkerCompleted (object sender, RunWorkerCompletedEventArgs e) {
progressForm.Close (); //
}
formprogressform;
公共无效函数(){
BackgroundWorker bw=新的BackgroundWorker();
bw.DoWork+=新DoWorkEventHandler(bw_DoWork);
bw.RunWorkerCompleted+=新的RunWorkerCompletedEventHandler(bw\u RunWorkerCompleted);
progressForm=新形式();
ProgressBar pb=新的ProgressBar();
pb.MarqueeAnimationSpeed=30;
pb.Style=ProgressBarStyle.Marquee;
pb.Dock=DockStyle.Fill;
progressForm.ClientSize=新大小(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….”;//在此处填写查询字符串
var params=新的KeyValuePair(sorgu,queryString);
bw.RunWorkerAsync(params);
}
void bw_DoWork(对象发送方,DoWorkEventArgs e){
KeyValuePair参数=e。参数为KeyValuePair;
ConnectionClass cc=新连接类();
cc.fillGrid(参数值、参数键);
}
void bw_RunWorkerCompleted(对象发送方,RunWorkerCompletedEventArgs e){
progressForm.Close()//
}
可以向BackgroundWorker发送参数。如果需要多个参数,可以发送包含所需对象的元组
编辑:如果您使用的是3.5,则可以改用KeyValuePair。代码已为此进行了更新。正如建议的那样,您必须为此目的使用
但是,由于您希望将其与ProgressBar绑定,因此我建议您阅读关于CodeProject的这篇文章:
它相当容易使用,并自动为您更新进度栏。您需要做的就是记住不时调用
ProgressWorker.ReportProgress
方法,以更新相关的进度条。查看后台工作类。谢谢你的评论,效果很好。但是我有一个小问题。我的数据填充函数在一个类中,接受2个参数(query和gridcontrol),我在我的项目public void fillGridControl(string sorgu,gridcontrol gc)的任何地方都使用它{BindingSource dataSource=new BindingSource(Dt(sorgu),null);gc.dataSource=dataSource;}我可以把这个函数放在bw_DoWork事件中吗?@Rapunzo您只需从bw_DoWork事件内部调用fillGridControl函数即可。我不知道你的代码,但是有什么理由这不起作用吗?我也用代码更新了我的问题,如果你再看一看更新的代码,我将非常感激。应该是您需要的。我认为这个元组类不包括在.NET3.5中。所以我还是做不到。。。
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<GridControl, string>(sorgu, queryString);
bw.RunWorkerAsync (params);
}
void bw_DoWork (object sender, DoWorkEventArgs e) {
KeyValuePair<GridControl, string> params = e.Argument as KeyValuePair<GridControl, string>;
ConnectionClass cc = new Connection Class();
cc.fillGrid(params.Value, params.Key);
}
void bw_RunWorkerCompleted (object sender, RunWorkerCompletedEventArgs e) {
progressForm.Close (); //
}