BackgroundWorker为什么程序点击按钮时，一发布就死机，本地OK。
0
悬赏园豆：15
[待解决问题]
一：DO_Work代码
private void backgroundWorker_DoWork(object sender, DoWorkEventArgs e)
{
BackgroundWorker worker = sender as BackgroundWorker;
BuildCode(worker, e);
}
二：BuildCode
private void BuildCode(BackgroundWorker worker, DoWorkEventArgs e)
{
try
{
bool hasChecked = false;
if (this.lv_tbview.Items.Count > 0)
{
for (int i = 0; i < lv_tbview.Items.Count; i++)
{
if (lv_tbview.Items[i].Checked == true)
{
hasChecked = true;
}
}
if (hasChecked == false)
{
throw new Exception("你还没有选择任何数据库表字段！");
return;
//MessageBox.Show("你还没有选择任何数据库表字段！", "", MessageBoxButtons.OK, MessageBoxIcon.Information);
//return;
}
this.tabControl1.SelectedIndex = 1;
for (int i = 0; i < 10; i++)
{
if (worker.CancellationPending == true)
{
e.Cancel = true;
break;
}
else
{
Thread.Sleep(500);
worker.ReportProgress(i * 10);
}
}是这边问题么？
string tbName = this.labelTbName.Text.Exp_Trim();
DataTable dt = DalUtility.GetTableInfo(tbName, this.login);
if (radioButtonM.Checked)
{
builder = YixianCoderFactory.CreateCoderFactory("M");
this.rt_code.Text = builder.BuildCode(dt, tbName);
}
if (radioButtonD.Checked)
{
builder = YixianCoderFactory.CreateCoderFactory("D");
this.rt_code.Text = builder.BuildCode(dt, tbName);
}
if (radioButtonB.Checked)
{
builder = YixianCoderFactory.CreateCoderFactory("B");
this.rt_code.Text = builder.BuildCode(dt, tbName);
}执行代码
}
else
{
throw new Exception("你还没有选择数据库表！");
return;
//MessageBox.Show("你还没有选择数据库表！", "", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
catch (Exception ex)
{
//记录日志
throw ex;
//MessageBox.Show("生成出错，详细信息：" + ex.Message, "", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
三：ProgressChanged
private void backgroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
this.resultLabel.Text = temp.Exp_Format("进度报告：" + e.ProgressPercentage.ToString() + "%");
}
四：RunWorkerCompleted
private void backgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
if (e.Error != null)
{
resultLabel.Text = temp.Exp_Format("错误源：" + e.Error.Message);
return;
}
else if (e.Cancelled == true)
{
resultLabel.Text = temp.Exp_Format("已取消！");
return;
}
else
resultLabel.Text = temp.Exp_Format("生成完毕！");
this.buttonBuilder.Enabled = true;
this.buttonCancel.Enabled = false;
}
所有回答(1)
1
看了百度百科的一段介绍：
您必须非常小心，确保在 DoWork 事件处理程序中不操作任何用户界面对象。而应该通过 ProgressChanged和 RunWorkerCompleted 事件与用户界面进行通信。
后来代码修改如下：
一：搞个 用于 backgroundWorker.RunWorkerAsync(new BuildParamsInput(builder, dt, tbName));参数传递的对象
public struct BuildParamsInput
{
public IBuilder builder;
public DataTable dt;
public string tabName;
public BuildParamsInput(IBuilder builder, DataTable dt, string tabName)
{
this.builder = builder;
this.dt = dt;
this.tabName = tabName;
}
}
二：在DoWork中如下，注意一定不可以与用户界面的任何控件沾边（否则就发生如上面的问题，界面假死）
private void backgroundWorker_DoWork(object sender, DoWorkEventArgs e)
{
BackgroundWorker worker = sender as BackgroundWorker;
CreateCode(worker, e);
}
三： 也贴上CreateCode的代码
private void CreateCode(BackgroundWorker worker, DoWorkEventArgs e)
{
BuildParamsInput buildParamsInput = (BuildParamsInput)e.Argument;
for (int i = 0; i < 10; i++)
{
Thread.Sleep(500);
worker.ReportProgress(i * 10);
if (worker.CancellationPending)
{
e.Cancel = true;
return;
}
}
//this.rt_code.Text = builder.BuildCode(dt, tbName);
e.Result = buildParamsInput.builder.BuildCode(buildParamsInput.dt, buildParamsInput.tabName);
}