C# 交叉线程操作无效:控件'';从创建它的线程以外的线程访问 private void MMScrpt() { 尝试 { MySqlConnectionStringBuilder connBuilder=new MySqlConnectionStringBuilder(); 添加(“数据库”,databaseMM); 添加(“数据源”、“本地主机”); 添加(“用户Id”、“根”); 添加(“密码”,txtPassword.Text); MySqlConnection=newmysqlconnection(connBuilder.ConnectionString); MySqlCommand cmd=connection.CreateCommand(); connection.Open(); progressBar1.最小值=0; progressBar1.步骤=1; progressBar1.值=0; 字符串MMScript=Properties.Resources.millmancompany; string[]tokens=MMScript.Split(“;”); progressBar1.Maximum=tokens.Length; for(int i=0;i
您无法访问线程上的UI控件。您应该使用调度程序或任务来更新UI组件 例如,添加对windowBase的引用,在启动线程之前保留对当前调度程序的引用,并使用它更新控件:C# 交叉线程操作无效:控件'';从创建它的线程以外的线程访问 private void MMScrpt() { 尝试 { MySqlConnectionStringBuilder connBuilder=new MySqlConnectionStringBuilder(); 添加(“数据库”,databaseMM); 添加(“数据源”、“本地主机”); 添加(“用户Id”、“根”); 添加(“密码”,txtPassword.Text); MySqlConnection=newmysqlconnection(connBuilder.ConnectionString); MySqlCommand cmd=connection.CreateCommand(); connection.Open(); progressBar1.最小值=0; progressBar1.步骤=1; progressBar1.值=0; 字符串MMScript=Properties.Resources.millmancompany; string[]tokens=MMScript.Split(“;”); progressBar1.Maximum=tokens.Length; for(int i=0;i,c#,winforms,C#,Winforms,您无法访问线程上的UI控件。您应该使用调度程序或任务来更新UI组件 例如,添加对windowBase的引用,在启动线程之前保留对当前调度程序的引用,并使用它更新控件: private void MMScrpt() { try { MySqlConnectionStringBuilder connBuilder = new MySqlConnectionStringBuilder(); connBuilder.Add("Database", datab
private void MMScrpt()
{
try
{
MySqlConnectionStringBuilder connBuilder = new MySqlConnectionStringBuilder();
connBuilder.Add("Database", databaseMM);
connBuilder.Add("Data Source", "localhost");
connBuilder.Add("User Id", "root");
connBuilder.Add("Password", txtPassword.Text);
MySqlConnection connection = new MySqlConnection(connBuilder.ConnectionString);
MySqlCommand cmd = connection.CreateCommand();
connection.Open();
progressBar1.Minimum = 0;
progressBar1.Step = 1;
progressBar1.Value = 0;
string MMScript = Properties.Resources.millmancompany;
string[] tokens = MMScript.Split(';');
progressBar1.Maximum = tokens.Length;
for (int i = 0; i < tokens.Length; i++)
{
MMtokens = tokens[i];
cmd.CommandText = MMtokens.ToString();
cmd.CommandType = CommandType.Text;
cmd.ExecuteNonQuery();
progressBar1.PerformStep();
}
connection.Close();
connection.Close();
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error Message");
}
}
private void BTNsriptRUN_Click(object sender, EventArgs e)
{
Thread tr1 = new Thread(new ThreadStart(MMScrpt));
tr1.Start();
//MMScrpt();
}
可能的重复使用async/await的引入,您可以轻松地重写代码,而无需显式创建任何线程。因此,如果可能的话,花一些时间在这上面,节省你自己的时间。
//Reference to CurrentDispatcher before launching thread:
Dispatcher myDispatcher = Dispatcher.CurrentDispatcher;
myDispatcher.BeginInvoke(new Action(() =>
{
progressBar1.Minimum = 0;
progressBar1.Step = 1;
progressBar1.Value = 0;
}));