从其他forms的方法中获取值

我有一个问题，我在一个方法中检索一个不同forms的值到我的主窗体。

这是我的代码:(这是我想要检索值的主要forms。）

private void EstimationComp_Click(object sender, EventArgs e) { PaintingFender pff = new PaintingFender(); textBox8.Text = panels; textBox30.Text = amounts; panels = pff.panel(); descr = pff.desc(); status = pff.stats(); amounts = pff.amount(); dtg.RowCount = 5; dtg[0, 0].Value = panels; dtg[1, 0].Value = descr; dtg[2, 0].Value = status; dtg[3, 0].Value = amounts; } 

这是我声明方法的forms，当我选择radiobutton时，我想从添加按钮中检索值：

 public string panel() { return p; } public string desc() { return d; } public string stats() { return s; } public string amount() { return a; } private void TADD_bump_Click(object sender, EventArgs e) { try { if ((conn == null) || (conn.State != ConnectionState.Open)) { MessageBox.Show("unable to connect to database", "error"); return; } else { OleDbCommand cmd = new OleDbCommand("select * from p_painting"); cmd.CommandType = CommandType.Text; cmd.Connection = conn; da = new OleDbDataAdapter(cmd); ds = new DataSet("ds"); da.Fill(ds); ds.Tables[0].TableName = "table_mirror"; dtg.DataSource = ds.Tables["table_mirror"]; } } catch (Exception x) { MessageBox.Show(x.Message); } if (frontbumper.Checked == true) { status(); d = frontbumper.Text; a = textBox2.Text; p = "Fender"; if (bump_light.Checked == true) { s = "Light Repair"; } if (bump_moderate.Checked == true) { s = "Moderate Repair"; } if (bump_heavy.Checked == true) { s = "Heavy Repair"; } if (bump_replacement.Checked == true) { s = "Replacement"; } } 

我跟踪了该方法，并且我认为它在点击时不会从按钮获取值，因为从程序的开头已经执行了该方法。 我只想在单击按钮时执行该方法，以便我可以从TADD按钮检索值，以便在我的主窗体中传递字符串值，即estimatecomp。

Answer 1

在您的主窗体上创建一个公共字段。 财产会更好。

在包含要共享的值的变量的方法中设置此字段或属性。

现在，从引用子窗体实例的子窗口，您应该可以访问包含所需值的字段。

Answer 2

 private void EstimationComp_Click(object sender, EventArgs e) { NameOfDifferentForm nodf = new NameOfDifferentForm(); string s = nodf.panel(); //or string s = new NameOfDifferentForm.panel(); } 

Answer 3

我不太了解你的问题。 所以我只是编写了一个表单，调用一些孩子并处理这些孩子的答案。 也许这个例子可以帮助。

Form.Designer.cs

 namespace WindowsFormsApplication { partial class FormMain { /// 
 /// Required designer variable. /// 
 private System.ComponentModel.IContainer components = null; /// 
 /// Clean up any resources being used. /// 
 /// true if managed resources should be disposed; otherwise, false. protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dispose(); } base.Dispose(disposing); } #region Windows Form Designer generated code /// 
 /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// 
 private void InitializeComponent() { this.buttonCancel = new System.Windows.Forms.Button(); this.textBoxMessage = new System.Windows.Forms.TextBox(); this.buttonOk = new System.Windows.Forms.Button(); this.buttonDialogResult = new System.Windows.Forms.Button(); this.buttonEvent = new System.Windows.Forms.Button(); this.SuspendLayout(); // // buttonCancel // this.buttonCancel.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right))); this.buttonCancel.DialogResult = System.Windows.Forms.DialogResult.Cancel; this.buttonCancel.Location = new System.Drawing.Point(255, 138); this.buttonCancel.Name = "buttonCancel"; this.buttonCancel.Size = new System.Drawing.Size(75, 23); this.buttonCancel.TabIndex = 4; this.buttonCancel.Text = "&Cancel"; this.buttonCancel.UseVisualStyleBackColor = true; this.buttonCancel.Click += new System.EventHandler(this.OnButtonExitClick); // // textBoxMessage // this.textBoxMessage.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) | System.Windows.Forms.AnchorStyles.Left) | System.Windows.Forms.AnchorStyles.Right))); this.textBoxMessage.Location = new System.Drawing.Point(12, 12); this.textBoxMessage.Multiline = true; this.textBoxMessage.Name = "textBoxMessage"; this.textBoxMessage.Size = new System.Drawing.Size(318, 120); this.textBoxMessage.TabIndex = 0; this.textBoxMessage.TextChanged += new System.EventHandler(this.OnTextChanged); // // buttonOk // this.buttonOk.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Right))); this.buttonOk.DialogResult = System.Windows.Forms.DialogResult.OK; this.buttonOk.Location = new System.Drawing.Point(174, 138); this.buttonOk.Name = "buttonOk"; this.buttonOk.Size = new System.Drawing.Size(75, 23); this.buttonOk.TabIndex = 3; this.buttonOk.Text = "&OK"; this.buttonOk.UseVisualStyleBackColor = true; this.buttonOk.Click += new System.EventHandler(this.OnButtonExitClick); // // buttonDialogResult // this.buttonDialogResult.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left))); this.buttonDialogResult.Location = new System.Drawing.Point(12, 138); this.buttonDialogResult.Name = "buttonDialogResult"; this.buttonDialogResult.Size = new System.Drawing.Size(75, 23); this.buttonDialogResult.TabIndex = 1; this.buttonDialogResult.Text = "by Result"; this.buttonDialogResult.UseVisualStyleBackColor = true; this.buttonDialogResult.Click += new System.EventHandler(this.OnButtonResultClick); // // buttonEvent // this.buttonEvent.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Bottom | System.Windows.Forms.AnchorStyles.Left))); this.buttonEvent.Location = new System.Drawing.Point(93, 138); this.buttonEvent.Name = "buttonEvent"; this.buttonEvent.Size = new System.Drawing.Size(75, 23); this.buttonEvent.TabIndex = 2; this.buttonEvent.Text = "by Event"; this.buttonEvent.UseVisualStyleBackColor = true; this.buttonEvent.Click += new System.EventHandler(this.OnButtonEventClick); // // Form1 // this.AcceptButton = this.buttonOk; this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.CancelButton = this.buttonCancel; this.ClientSize = new System.Drawing.Size(342, 173); this.Controls.Add(this.buttonEvent); this.Controls.Add(this.buttonDialogResult); this.Controls.Add(this.buttonOk); this.Controls.Add(this.textBoxMessage); this.Controls.Add(this.buttonCancel); this.MinimumSize = new System.Drawing.Size(350, 200); this.Name = "Form1"; this.StartPosition = System.Windows.Forms.FormStartPosition.CenterParent; this.Text = "My Dialog"; this.ResumeLayout(false); this.PerformLayout(); } #endregion private System.Windows.Forms.Button buttonCancel; private System.Windows.Forms.TextBox textBoxMessage; private System.Windows.Forms.Button buttonOk; private System.Windows.Forms.Button buttonDialogResult; private System.Windows.Forms.Button buttonEvent; } } 

Form.cs

 using System; using System.Windows.Forms; namespace WindowsFormsApplication { public partial class FormMain : Form { private bool _IsDialog = false; private int _InstanceCounter = 1; private string _Suffix = String.Empty; public FormMain() { InitializeComponent(); } //Special constructor to see in Caption of the Form //that this is a child window public FormMain(string suffix) : this() { _Suffix = suffix; Text += " " + _Suffix; } //Reflects the content of the TextBox to the outer world public string Result { get { return textBoxMessage.Text; } set { textBoxMessage.AppendText(value + Environment.NewLine); //Fire an event if the content has changed ResultChanged.Raise(this); } } public event EventHandler ResultChanged; //Overwrite ShowDialog() to find out if where called by Show() or ShowDialog() public new DialogResult ShowDialog() { _IsDialog = true; return base.ShowDialog(); } //Pass event of changed text of the TextBox to the outer world private void OnTextChanged(object sender, EventArgs e) { ResultChanged.Raise(this); } private void OnButtonResultClick(object sender, EventArgs e) { //Create a new child form (including new suffix to see that this is a child) var childForm = new FormMain(_Suffix + "." + _InstanceCounter++.ToString()); //Start modal and wait for the result if (DialogResult.OK == childForm.ShowDialog()) { Result = childForm.Result; } } private void OnButtonEventClick(object sender, EventArgs e) { //Create a new child form (including new suffix to see that this is a child) var childForm = new FormMain(_Suffix + "." + _InstanceCounter++.ToString()); //Listen to events of the child form childForm.ResultChanged += OnChildFormResultChanged; childForm.FormClosed += OnChildFormFormClosed; //Open the form concurrently childForm.Show(); } private void OnButtonExitClick(object sender, EventArgs e) { //When we were not opened with ShowDialog() we have to do //the closing on ourself. if (!_IsDialog) { var button = sender as Button; if (button != null) { DialogResult = button.DialogResult; Close(); } } } void OnChildFormResultChanged(object sender, EventArgs e) { //Write changes from child form into our TextBox var childForm = sender as FormMain; if (childForm != null) { Result = childForm.Result; } } void OnChildFormFormClosed(object sender, FormClosedEventArgs e) { //Disconnect events from child form var childForm = sender as FormMain; if (childForm != null) { childForm.ResultChanged -= OnChildFormResultChanged; childForm.FormClosed -= OnChildFormFormClosed; } } } public static class EventExtensions { //Simple extension class to wrap thread safe firing of events public static void Raise(this EventHandler handler, object sender) { var temp = handler; if (temp != null) temp(sender, EventArgs.Empty); } } }