我的代码不应该跳转到一个函数

Question

以下是我跟踪志愿者的程序。我的问题是，对于下面的两个函数，当调用fillListBoxData() 时，大约在中途跳转到fillDataGridView 函数。在第 15 行，dataAda1.Fill(datTab3); 程序立即跳转到fillDataGridView(string fullName)。我不知道为什么。

谁能帮助我，让这个程序停止这样做。

public void fillListBoxData()
    {
        //Open connection
        //found in app.config
        using (SqlConnection conn = new SqlConnection(Properties.Settings.Default.Database1ConnectionString))//database ONE
        {
            //open the connection
            conn.Open();

            // Create new DataAdapter
            using (SqlDataAdapter dataAda1 = new SqlDataAdapter("SELECT (firstName + ' ' + lastName) AS NAME FROM dbo.VolunteerContactInfo", conn))
            {
                // Use DataAdapter to fill DataTable
                DataTable datTab3 = new DataTable();
                dataAda1.Fill(datTab3);                

                //assign the dataTable as the dataSource for the listbox
                volList.DataSource = datTab3;
                //display member needed to show text
                volList.DisplayMember = "NAME";
                conn.Close();

            }
        }
    }

void fillDataGridView(string fullName)
    {
        string tableName = "dbo." + fullName;
        // Open connection
        using (SqlConnection conn = new SqlConnection(Properties.Settings.Default.Database2ConnectionString))//database TWO
        {
            //open the connection
            conn.Open();

            // Create new DataAdapter
            using (SqlDataAdapter dataAda = new SqlDataAdapter("SELECT * FROM " + @tableName, conn))
            {
                // Use DataAdapter to fill DataTable
                DataTable datTab = new DataTable();
                dataAda.Fill(datTab);

                volWorkDataGrid.DataSource = datTab;

            }
            conn.Close();
        }
    }

Answer 1

在“初始化”数据时使用临时标志来抑制事件处理程序。

bool _suppressEvent = false;

public void fillListBoxData() 
{
    try
    {
         _suppressEvent = true;

         ...Do whatever you want here
    }
    finally
    {
        _suppressEvent = false;
    }
}

void volList_SelectedIndexChanged(object sender, EventArgs e)
{
    if( _suppressEvent ) return;

    ...
}

try/finally 确保无论 try 子句中发生什么（异常、返回等），您的抑制标志将始终关闭。否则，您可能会遇到一些难以追踪的奇怪行为。