Question

我创建了一个用户控件和一个类文件，用户控件包含保存按钮。当用户单击“保存”按钮然后我想使用来自infocore类文件的ItemClickedEventHandler调用Insert（）时请帮帮我。

C＃：用户控制

public partial class toolbar : UserControl
{
    public delegate void ItemClickedEventHandler(System.Object sender, ItemClickEventArgs     e);
    public toolbar()
    {
        InitializeComponent();
        inf = new IAToolBar.infocore();
    }
    public event ItemClickedEventHandler ItemClicked;


    public class ItemClickEventArgs
    {
        public string flag;
        public ItemClickEventArgs(string flg)
        {
            flag = flg;
        }
    }

    private void btnsave_Click(object sender, EventArgs e)
    {
        if (ItemClicked != null)
        {
            ItemClicked(sender, new ItemClickEventArgs("Save"));
        }
    }
}

C＃：infocore.cs

public void Insert(System.Windows.Forms.Form f, e)
{
connection.Open();
try
{
query = "INSERT INTO " + f.Tag.ToString().Trim() + " (" + queryfields + ") VALUES (" + formvalues + ") ";
MySqlCommand cmd = new MySqlCommand(query, connection);
cmd.ExecuteNonQuery();
MessageBox.Show("Save Sucessfully", "Inventory Accountancy", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message.ToString(), "Inventory Accountancy", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
finally
{
connection.Close();
}
}

Answer 1

创建ItemClicked类的实例时，您需要订阅活动toolbar。

我没有看到你的整个代码，这是一个示例：

C＃：infocore.cs - 假设您在此处创建工具栏实例

            //Creating toolbar object
            toolbar objToolBar = new toolbar();
            objToolBar.ItemClicked += new toolbar.ItemClickedEventHandler(objToolBar_ItemClicked);


            //Handler to ItemClicked Event 
            void objToolBar_ItemClicked(object sender, MainWindow.toolbar.ItemClickEventArgs e)
            {
                 //Call Insert Method From here
            }

如何使用c＃从用户控件中调用类文件的click事件

1 个答案: