我有一个Devexpress表单，它有Progress bar和MessageBox。 当我单击表单上的搜索按钮时，进度条显示百分比，然后网格将与记录绑定。 当它没有返回任何记录时，会在进度条之后显示消息框，例如＆＃34;没有找到记录＆＃34;
但在显示未找到任何记录后，它会自动关闭而不会单击消息框上的“确定”或“取消”按钮
进度条代码
namespace DMS
{
public partial class ProgressBar : WaitForm
{
public ProgressBar()
{
InitializeComponent();
}
#region Overrides
public override void SetCaption(string caption)
{
base.SetCaption(caption);
this.progressPanel1.Caption = caption;
}
public override void SetDescription(string description)
{
base.SetDescription(description);
this.progressPanel1.Description = description;
}
public override void ProcessCommand(Enum cmd, object arg)
{
base.ProcessCommand(cmd, arg);
}
#endregion
private void progressBarControl1_EditValueChanged(object sender, EventArgs e)
{
try
{
int i = int.Parse(Math.Floor(double.Parse(this.progressBarControl1.EditValue.ToString())).ToString());
if (i.ToString().EndsWith("0"))
{
//satya
//i += 5;
i += 0;
}
this.Opacity = 100;
SetCaption("Please Wait...");
SetDescription(i.ToString() + "% Completed...");
Application.DoEvents();
}
catch (Exception ex)
{
XtraMessageBox.Show(ex.Message.ToString() + " " + ex.Source.ToString());
}
}
}
}
显示留言箱的代码
private void btnshow_Click(object sender, EventArgs e)
{
try
{
if (dtstartdate.DateTime.Date > dtEnddate.DateTime.Date)
{
XtraMessageBox.Show("Start date should be less than End date", Program.MessageBoxTitle, MessageBoxButtons.OK, MessageBoxIcon.Error);
dtstartdate.Focus();
return;
}
string CommandText = "select * from DMS_View_Payments where v_Paymentdate between '" + General.DateToDatabase(this.dtstartdate.DateTime.ToShortDateString())
+ "' and '" + General.DateToDatabase(this.dtEnddate.DateTime.ToShortDateString()) + "'";
if (ccbeForClient.EditValue.ToString() != string.Empty)
{
CommandText += " and v_clientid in (" + this.ccbeForClient.EditValue.ToString() + ")";
}
else if (Logs.UserLimitedClients != "0")
{
CommandText += " and v_clientid in (" + Logs.UserLimitedClients + ")";
}
if (ccbeForBatch.Text.Trim() != "" && ccbeForBatch.Text.Trim() != "--")
{
string selected_client_list = "";
if (ccbeForBatch.Text.Trim() != "" && ccbeForBatch.Text.Trim() != "--")
{
//selected_client_list = ccbe_client_list.Text.Replace(" ", "").Replace(",", "','");
string source = ccbeForBatch.Text;
string[] split = source.Split(',');
string changed = "";
for (int i = 0; i < split.Length; i++)
{
changed += "," + split[i].Trim();
}
//string output = changed.Trim(',').Replace(",", "','");
selected_client_list = changed.Trim(',').Replace(",", "','");
}
else
{
selected_client_list = "";
}
CommandText += " and v_Batch in ('" + selected_client_list + "') ";
}
if (ccbeForBranch.EditValue.ToString() != string.Empty)
{
CommandText += " and v_BRANCH_ID in (" + ccbeForBranch.EditValue.ToString() + ")";
}
if (ccbeForCollector.EditValue.ToString() != string.Empty)
{
CommandText += " and V_CollectorId in (" + ccbeForCollector.EditValue.ToString() + ")";
}
else if (DevXCharts.EmpIdsForHierarchey != "")
{
CommandText += " and V_CollectorId in (" + DevXCharts.EmpIdsForHierarchey.ToString() + ")";
}
if (ccbeForAccountType.Text.Trim() != "" && ccbeForAccountType.Text.Trim() != "--")
{
string selected_client_list = "";
if (ccbeForAccountType.Text.Trim() != "" && ccbeForAccountType.Text.Trim() != "--")
{
//selected_client_list = ccbe_client_list.Text.Replace(" ", "").Replace(",", "','");
string source = ccbeForAccountType.Text;
string[] split = source.Split(',');
string changed = "";
for (int i = 0; i < split.Length; i++)
{
changed += "," + split[i].Trim();
}
//string output = changed.Trim(',').Replace(",", "','");
selected_client_list = changed.Trim(',').Replace(",", "','");
}
else
{
selected_client_list = "";
}
CommandText += " and v_AccountType in ('" + selected_client_list + "') ";
}
if (radioPayment.SelectedIndex == 0)
{
CommandText += " and v_Confirmed='Y'";
}
else if (radioPayment.SelectedIndex == 1)
{
CommandText += " and v_Confirmed='N'";
}
if (radioCases.SelectedIndex == 0)
{
CommandText += " and v_flagabort='0'";
}
else if (radioCases.SelectedIndex == 1)
{
CommandText += " and v_flagabort='1'";
}
CommandText += " order by v_debtorname";
Application.DoEvents();
if (objPB != null)
{
objPB.Close();
objPB = null;
}
objPB = new ProgressBar();
objPB.StartPosition = FormStartPosition.CenterScreen;
objPB.progressBarControl1.EditValue = 20;
objPB.TopMost = true;
objPB.ShowInTaskbar = false;
Application.DoEvents();
objPB.Show();
Application.DoEvents();
SqlDataAdapter sql_for_debtors = new SqlDataAdapter(CommandText, DBConString.ConnectionString());
DataSet ds_for_rhb = new DataSet();
sql_for_debtors.SelectCommand.CommandTimeout = 0;
sql_for_debtors.Fill(ds_for_rhb, "DMS_View_Payments");
sql_for_debtors.Dispose();
Application.DoEvents();
objPB.progressBarControl1.EditValue = 40;
Application.DoEvents();
if (ds_for_rhb.Tables["DMS_View_Payments"].Rows.Count > 0)
{
XrtPaymentsDevx obj_report = new XrtPaymentsDevx();
obj_report.xrlReportHeader.Text = "Payments From " + this.dtstartdate.DateTime.ToString("dd/MM/yyyy") + " To " + this.dtEnddate.DateTime.ToString("dd/MM/yyyy");
string SelectionCriteria = "";
if (this.ccbeForClient.Text != "" && this.ccbeForClient.Text != "--")
{
SelectionCriteria += " Client: " + this.ccbeForClient.Text + " , ";
}
if (this.ccbeForBatch.Text != "" && this.ccbeForBatch.Text != "--")
{
SelectionCriteria += " Batch: " + this.ccbeForBatch.Text + " , ";
}
if (this.ccbeForBranch.Text != "" && this.ccbeForBranch.Text != "--")
{
SelectionCriteria += " Branch: " + this.ccbeForBranch.Text + " , ";
}
if (this.ccbeForCollector.Text != "" && this.ccbeForCollector.Text != "--")
{
SelectionCriteria += " Collector: " + this.ccbeForCollector.Text + " , ";
}
if (this.ccbeForAccountType.Text != "" && this.ccbeForAccountType.Text != "--")
{
SelectionCriteria += " AccType: " + this.ccbeForAccountType.Text + " , ";
}
if (radioPayment.SelectedIndex == 0)
{
SelectionCriteria += " Payment Confirmed='Y'" + " , ";
}
else if (radioPayment.SelectedIndex == 1)
{
SelectionCriteria += " Payment Confirmed='N'" + " , ";
}
else if (radioPayment.SelectedIndex == 2)
{
SelectionCriteria += " Payment Confirmed='Y' And 'N'" + " , ";
}
if (radioCases.SelectedIndex == 1)
{
SelectionCriteria += " Abort Cases" + " , ";
}
else if (radioCases.SelectedIndex == 0)
{
SelectionCriteria += " Active Cases" + " , ";
}
else if (radioCases.SelectedIndex == 2)
{
SelectionCriteria += " Both Active And Abort Cases" + " , ";
}
obj_report.xrlSelectionCriteria.Text = SelectionCriteria;
obj_report.DataSource = ds_for_rhb;
obj_report.DataMember = "DMS_View_Payments";
Application.DoEvents();
objPB.progressBarControl1.EditValue = 60;
Application.DoEvents();
obj_report.CreateDataBindings();
Application.DoEvents();
objPB.progressBarControl1.EditValue = 80;
Application.DoEvents();
//obj_report.bind_data();
obj_report.ShowPreview();
Application.DoEvents();
objPB.progressBarControl1.EditValue = 90;
Application.DoEvents();
Application.DoEvents();
objPB.progressBarControl1.EditValue = 100;
Application.DoEvents();
objPB.Close();
Application.DoEvents();
}
else
{
XtraMessageBox.Show("No Records(s) Found", Program.MessageBoxTitle, MessageBoxButtons.OK, MessageBoxIcon.Information);
objPB.progressBarControl1.EditValue = 100;
//objPB.progressBarControl1.EditValue = 100;
Application.DoEvents();
objPB.Close();
//Application.DoEvents();
//objPB.progressBarControl1.EditValue = 100;
//Application.DoEvents();
//objPB.Close();
//XtraMessageBox.Show("No Records(s) Found", Program.MessageBoxTitle, MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
catch (Exception ex)
{
XtraMessageBox.Show(ex.Message.ToString() + " " + ex.Source.ToString(), Program.MessageBoxTitle, MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
答案 0 :(得分：0)
问题的原因是WaitForm 实例的使用不正确
您不应该直接显示/隐藏WaitForm，而是使用SplashScreenManager API来显示/隐藏WaitForm并与之交互。
在这里，我将尝试为您提供正确的方法：
首先，使用WaitForm显示运行搜索操作的代码应如下所示：
void OnRunSearchOperation_ButtonClick(object sender, EventArgs e) {
bool success = false;
SplashScreenManager.ShowForm(this, typeof(ProgressWaitForm), false, false);
try {
// here you can run some long time operations
success = SearchOperation();
}
finally { SplashScreenManager.CloseForm(); }
if(!success) {
XtraMessageBox.Show(this, "No entries found");
}
}
bool SearchOperation() {
// THIS IS SEARCH OPERATION IMITATION
const int count = 70000000;
int stepThreshold = count / 100;
decimal dec = 1.41M;
for(int i = 0; i < count; i++) {
dec /= 2;
if((i % stepThreshold) == 0)
SplashScreenManager.Default.SendCommand(WaitFormCommand.PerformStep, null);
}
return false; // result
}
以下是WaitFormCommand和'ProgressWaitForm'实现：
public enum WaitFormCommand {
PerformStep
}
public partial class ProgressWaitForm : WaitForm {
public ProgressWaitForm() {
InitializeComponent();
}
#region Overrides
public override void ProcessCommand(Enum cmd, object arg) {
base.ProcessCommand(cmd, arg);
WaitFormCommand wfCmd = (WaitFormCommand)cmd;
if(wfCmd == WaitFormCommand.PerformStep)
progressBarControl1.PerformStep();
}
#endregion
}