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從自定義WinForm中的自定義事件處理程序訪問控件

[英]Accessing Control from Custom Event Handler in Custom WinForm

我正在使用VS2010WinForm

我必須創建一個將輸出Windows窗體的類。 我這樣做是為了以這種形式執行一些操作,並最終將一些值傳遞給它的父級。 將數據發送到父部件的操作很好。 我已經測試並滿意。

但是,當我想在我做過的相同形式之間進行某些操作時,就會出現問題。 我想創建事件並告訴這些事件將要做什么。 我生成了事件處理程序,也可以去事件。 但是在事件處理程序中,我無法訪問我創建的任何控件 我只想訪問我在Show方法中創建的所有控件,請單擊我的事件按鈕。

這是我的代碼:

CustomSettingBox.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing;
using System.IO;

namespace ServerConnector
{
    class CustomSettingBox
    {
        ConnectionSettings CS = new ConnectionSettings();

    public List<string> GetServerName()
    {
        StreamReader sr = new StreamReader("Settings//ServerList.txt");
        string line = "";
        List<string> lstServerName = new List<string>();
        while ((line = sr.ReadLine()) != null)
        {
             lstServerName.Add(line.Trim());
        }
        sr.Close();
        return lstServerName;
    }





**public void buttonConnectServer_Click(object sender, EventArgs e)
        { MessageBox.Show("Done!");   `//this message is succesfully shown. but i cannot get access any of my controls defined in Show() method.`

        }**

    public DialogResult Show(ref string ServerName, ref string AuthenTicationType)
    {
        Form form = new Form();

        Label labelServerName = new Label(); //otherlabels here

        TextBox textBoxLogin = new TextBox(); //other textboxs here

        ComboBox comboboxServerName = new ComboBox(); //more combo's

        ListBox listboxAllColumn = new ListBox(); // more listbox's

        Button buttonConnectServer = new Button();
        Button buttonOk = new Button();
        Button buttonCancel = new Button();

        form.Text = "Add Setting";
        labelServerName.Text = "Select a Server";//other labels are defined


        List<string> lstServerName = GetServerName();//gets servername from a text
        foreach (string tmp in lstServerName)
        {
            comboboxServerName.Items.Add(tmp);
        }

        comboboxAuthenticationType.Items.Add("Wndows Server Authentication");
        comboboxAuthenticationType.Items.Add("SQL Server Authentication");


        buttonOk.DialogResult = DialogResult.OK;
        buttonCancel.DialogResult = DialogResult.Cancel;


        **buttonConnectServer.Click +=new System.EventHandler(this.buttonConnectServer_Click);**

        labelServerName.SetBounds(9, 20, 100, 13);//others are here

        comboboxServerName.SetBounds(120, 20, 200, 30);//others are here

        //comboboxServerName.SetBounds(12, 75, 372, 27);
        buttonOk.SetBounds(228, 450, 75, 23);
        buttonCancel.SetBounds(309, 450, 75, 23);

        labelServerName.AutoSize = true;//otheres are here

        comboboxServerName.Anchor = comboboxServerName.Anchor | AnchorStyles.Right; // others are here

        buttonConnectServer.Anchor = buttonConnectServer.Anchor | AnchorStyles.Right;
        buttonOk.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;
        buttonCancel.Anchor = AnchorStyles.Bottom | AnchorStyles.Right;

        form.ClientSize = new Size(600, 500);
        form.Controls.AddRange(new Control[] { labelServerName, labelAuthenticationType, labelLogin, labelPassword, labelDbName, labelTableName, labelSelectColumn, labelWhereColumn, comboboxServerName, comboboxAuthenticationType, textBoxLogin, textboxPassword, comboboxDbName, comboboxTableName, listboxAllColumn, listboxSelectColumn, listboxWhereColumn, buttonConnectServer, buttonOk, buttonCancel });

        form.FormBorderStyle = FormBorderStyle.FixedDialog;
        form.StartPosition = FormStartPosition.CenterScreen;
        form.MinimizeBox = false;
        form.MaximizeBox = false;
        form.AcceptButton = buttonOk;
        form.CancelButton = buttonCancel;

        DialogResult dialogResult = form.ShowDialog();

        ServerName = textBoxLogin.Text;
        AuthenTicationType = comboboxServerName.SelectedItem.ToString();
        return dialogResult;
    }
}

}

因為我對設計沒有問題,所以我嘗試避免這里的大多數設計代碼,因為它越來越大。

從另一個函數訪問局部函數變量是不可能的。 您必須將它們聲明為全局變量。

您可以將控制變量聲明為父表單中的字段,或者分配其Name屬性並使用Find方法訪問它們:

form.Controls.Find("control name", true);

(只要您將form聲明為父表單中的字段)。

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