我在C＃中调试时为什么会得到一个空白表单？

我刚刚摆脱了所有编译器错误。 其中一个问题是我不小心重命名了视觉forms本身，而不是我GUI上的一个单独的文本框。 当我去改变我在代码中弄乱的内容时，它似乎再次起作用。 但是，每当我按F5进行调试时，我会得到一个较小的空白窗口作为我的GUI，而不是我在Visual Studio中设计的窗口。 有什么建议？

这是我的主要（Forms）类代码：

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace beehive1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); Worker[] workers = new Worker[4]; workers[0] = new Worker(new string[] { "Nectar collector", "Honey Manufacturing" }); workers[1] = new Worker(new string[] { "Egg Care", "Baby Bee Tutoring" }); workers[2] = new Worker(new string[] { "Hive Maintenance", "Sting Patrol" }); workers[3] = new Worker(new string[] { "Nectar Collector", "Honey Manufacturing", "Egg Care", "Baby Bee Manufacturing", "Hive Maintenance", "Sting Patrol" }); queen = new Queen(workers); } Queen queen; private void assignJob_Click(object sender, EventArgs e) { if (queen.AssignWork(workerBeeJob.Text, (int)shifts.Value) == false) MessageBox.Show("No Workers Are Available To Do The Job " + workerBeeJob.Text + "", "The Queen Bee Says..."); else MessageBox.Show("The job " + workerBeeJob.Text + " will be done in " + shifts.Value + " shifts", "The Queen Bee Says..."); } private void button2_Click(object sender, EventArgs e) { report.Text = queen.WorkTheNextShift(); } } } 

编辑：设计师代码：

 namespace beehive1 { partial class Form1 { /// 
 /// 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.shiftLabel = new System.Windows.Forms.Label(); this.workerBeeJob = new System.Windows.Forms.ComboBox(); this.jobLabel = new System.Windows.Forms.Label(); this.shifts = new System.Windows.Forms.NumericUpDown(); this.groupBox1 = new System.Windows.Forms.GroupBox(); this.assignJob = new System.Windows.Forms.Button(); this.nextShift = new System.Windows.Forms.Button(); this.report = new System.Windows.Forms.TextBox(); ((System.ComponentModel.ISupportInitialize)(this.shifts)).BeginInit(); this.groupBox1.SuspendLayout(); this.SuspendLayout(); // // shiftLabel // this.shiftLabel.AutoSize = true; this.shiftLabel.Location = new System.Drawing.Point(287, 26); this.shiftLabel.Name = "shiftLabel"; this.shiftLabel.Size = new System.Drawing.Size(33, 13); this.shiftLabel.TabIndex = 0; this.shiftLabel.Text = "Shifts"; // // workerBeeJob // this.workerBeeJob.FormattingEnabled = true; this.workerBeeJob.Location = new System.Drawing.Point(27, 42); this.workerBeeJob.Name = "workerBeeJob"; this.workerBeeJob.Size = new System.Drawing.Size(121, 21); this.workerBeeJob.TabIndex = 1; // // jobLabel // this.jobLabel.AutoSize = true; this.jobLabel.Location = new System.Drawing.Point(24, 26); this.jobLabel.Name = "jobLabel"; this.jobLabel.Size = new System.Drawing.Size(84, 13); this.jobLabel.TabIndex = 2; this.jobLabel.Text = "Worker Bee Job"; // // shifts // this.shifts.Location = new System.Drawing.Point(290, 42); this.shifts.Name = "shifts"; this.shifts.Size = new System.Drawing.Size(74, 20); this.shifts.TabIndex = 3; // // groupBox1 // this.groupBox1.Controls.Add(this.assignJob); this.groupBox1.Controls.Add(this.shiftLabel); this.groupBox1.Controls.Add(this.workerBeeJob); this.groupBox1.Controls.Add(this.jobLabel); this.groupBox1.Controls.Add(this.shifts); this.groupBox1.Location = new System.Drawing.Point(32, 12); this.groupBox1.Name = "groupBox1"; this.groupBox1.Size = new System.Drawing.Size(384, 150); this.groupBox1.TabIndex = 4; this.groupBox1.TabStop = false; this.groupBox1.Text = "Worker Bee Job Assignments"; // // assignJob // this.assignJob.Location = new System.Drawing.Point(27, 70); this.assignJob.Name = "assignJob"; this.assignJob.Size = new System.Drawing.Size(121, 23); this.assignJob.TabIndex = 4; this.assignJob.Text = "Assign This Job"; this.assignJob.UseVisualStyleBackColor = true; this.assignJob.Click += new System.EventHandler(this.assignJob_Click); // // nextShift // this.nextShift.Location = new System.Drawing.Point(422, 38); this.nextShift.Name = "nextShift"; this.nextShift.Size = new System.Drawing.Size(79, 77); this.nextShift.TabIndex = 5; this.nextShift.Text = "Work The Next Shift"; this.nextShift.UseVisualStyleBackColor = true; this.nextShift.Click += new System.EventHandler(this.button2_Click); // // report // this.report.Location = new System.Drawing.Point(32, 199); this.report.Multiline = true; this.report.Name = "report"; this.report.Size = new System.Drawing.Size(384, 157); this.report.TabIndex = 6; // // Form // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(539, 398); this.Controls.Add(this.report); this.Controls.Add(this.nextShift); this.Controls.Add(this.groupBox1); this.Name = "Form"; this.Text = "Beehive Management System"; ((System.ComponentModel.ISupportInitialize)(this.shifts)).EndInit(); this.groupBox1.ResumeLayout(false); this.groupBox1.PerformLayout(); this.ResumeLayout(false); this.PerformLayout(); } #endregion private System.Windows.Forms.Label shiftLabel; private System.Windows.Forms.ComboBox workerBeeJob; private System.Windows.Forms.Label jobLabel; private System.Windows.Forms.NumericUpDown shifts; private System.Windows.Forms.GroupBox groupBox1; private System.Windows.Forms.Button assignJob; private System.Windows.Forms.Button nextShift; private System.Windows.Forms.TextBox report; } } 

也许应用程序不再连接到该Form类？ 我尝试过Clean Build和ReBuild，但它似乎没有用。

Answer 1

空白表单表示InitializeComponent()未激活或this.Controls.Add未正确添加控件。 尝试逐步调试并激活所有CLRexception，以确保构造函数中不会发生exception。 告诉我们表格的构造。

编辑：

如上所示，应该检查不检查。 现在在调试模式下运行您的表单，看看是否发生任何例外情况。 请添加您对表单的调用方式：

 Form1 newForm=new Form1(); 

Answer 2

检查是否在Main方法中构造Form（ new Form() ）实例而不是Form1() 。

Answer 3

有时，visual studio会出错（例如在重命名项目/表单/目录时）。 我自己也是这样，直到我发现：

 this.Controls.Add(*form object name*); 

Form1.Designer.cs文件中缺少的行。 这些是“自动生成”的行，但显然汽车生成并不总是顺利。

我写了一个快速而又脏的python脚本，试图解决这个问题。 将脚本与xxx.Designer.cs文件的副本一起放入新目录并运行它。 它将生成一个可能是固定的xxx.Designer.cs.fix文件。 节省了大量的手动复制粘贴。

 import os #get current dir from which the script runs (should also contain the xxx.Designer.cs file) daDir = os.path.dirname(os.path.abspath(__file__)) #the file extension we're looking for ext = ".Designer.cs" #list of all files in the dir from which the script runs FileList = os.listdir(daDir) FileToOpen = "" ObjNameStr = "" OriginalFileName = "SORRY, AUTO FIXING FAILED" #the file to open (any first match for .Designer.cs) for str in FileList: if (str.endswith(ext)): OriginalFileName = str FileToOpen = daDir + "\\" + str break if FileToOpen != "": print("File found: " + FileToOpen) fileToFix = open(FileToOpen, 'r') FormObjStrList = [] for str in fileToFix: # remove whitepaces/leading tabs str = str.lstrip() # get first part of string: "this.formobjectName" str = str.partition(' ')[0] if str.startswith("this.") and (str.count('.') == 1): ObjNameStr = str #add Form object to list if unique: if (ObjNameStr not in FormObjStrList) and ("this.components" not in ObjNameStr): #No more objects after SuspendLayout property if ("this.SuspendLayout" in ObjNameStr): break else: FormObjStrList.append("this.Controls.Add(" + ObjNameStr + ");") # copy original file to a stringlist that will be the fixed file FixedFile = fileToFix.read().splitlines() # look op the location to copy the new string list into i = 0 for str in FixedFile: if ("this.AutoScaleMode" in str): break i += 1 i += 1 # Create the new xxx.Designer.cs fixed file by adding the extra generated lines for str in FormObjStrList: FixedFile.insert(i, str) else: print("No fixable file found. ") print(FormObjStrList) # Save the new fixed file (manually check/correct this) FixedFileSave = open(OriginalFileName + ".fix", 'w') FixedFileSave.write("\n".join(FixedFile)) FixedFileSave.close() print("New fixed file saved as: " + OriginalFileName + ".fix") print("Please manually check if the generated file is correct for your project.")