错误:无法从"Bcode.Form1"转换为"System.Windows.Forms.Form" [英] Error : cannot convert from 'Bcode.Form1' to 'System.Windows.Forms.Form'
问题描述
您好，我在调试以下提到的程序时遇到错误.该程序将生成条形码.我在下面的代码中提到了pls help;
命名空间Bcode
{
公共局部类Form1:UserControl
{
私有AlignType align = AlignType.Center;
私有字符串字母39 ="0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-.$/+％*";
私有字符串代码="1234567890";
私有字符串[] coded39Char =新字符串[] {
"000110100"，"100100001"，"001100001"，"101100000"，"000110001"，"100110000"，"001110000"，"000100101"，"100100100"，"001100100"，"100001001"，"001001001"，"101001000" ，" 000011001，" 100011000，" 001011000，
"000001101"，"100001100"，"001001100"，"000011100"，"100000011"，"001000011"，"101000010"，"000010011"，"100010010"，"001010010"，"000000111"，"100000110"，"001000110" ，" 000010110，" 110000001，" 011000001，
"111000000"，"010010001"，"110010000"，"011010000"，"010000101"，"110000100"，"011000100"，"010101000"，"010100010"，"010001010"，"000101010"，"010010100"
};
私有容器组件= null;
private Font footerFont = new Font("Courier"，8f);
private Font headerFont = new Font("Courier"，18f);
私有字符串headerText ="BarCode Demo";
私人int高度= 50;
private int leftMargin = 10;
专用面板panel1;
私有PrintDocument printDocument1;
私人布尔showFooter;
私人布尔showHeader;
private int topMargin = 10;
私人BarCodeWeight重量= BarCodeWeight.Small;
[STAThread]
静态void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
//以上错误
}
公共Form1()
{
InitializeComponent();
}
私有void BarCodeCtrl_Resize(对象发送者，EventArgs e)
{
this.panel1.Invalidate();
}
受保护的重写void Dispose(布尔处置)
{
if(处置&&(this.components！= null))
{
this.components.Dispose();
}
base.Dispose(处置);
}
私有void InitializeComponent()
{
this.panel1 =新的System.Windows.Forms.Panel();
this.printDocument1 =新的System.Drawing.Printing.PrintDocument();
this.SuspendLayout();
//
//panel1
//
this.panel1.BackColor = System.Drawing.SystemColors.Window;
this.panel1.Dock = System.Windows.Forms.DockStyle.Fill;
this.panel1.Location =新的System.Drawing.Point(0，0);
this.panel1.Name ="panel1";
this.panel1.Size = new System.Drawing.Size(302，228);
this.panel1.TabIndex = 0;
this.panel1.Paint + =新的System.Windows.Forms.PaintEventHandler(this.panel1_Paint);
//
//printDocument1
//
this.printDocument1.PrintPage + =新的System.Drawing.Printing.PrintPageEventHandler(this.printDocument1_PrintPage);
//
//Form1
//
this.ClientSize = new System.Drawing.Size(302，228);
this.Controls.Add(this.panel1);
this.Name ="Form1";
this.Resize + = new System.EventHandler(this.BarCodeCtrl_Resize);
this.ResumeLayout(false);
}
当我运行此程序时，出现错误无法从Bcode.Form1转换为system.windows.forms.form
Hi frnds i am facing an error while debugging the below mentioned program. The program is to generate barcode. I am mentioning the code below pls help;
namespace Bcode
{
public partial class Form1 : UserControl
{
private AlignType align = AlignType.Center;
private string alphabet39 = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ-. $/+%*";
private string code = "1234567890";
private string[] coded39Char = new string[] {
"000110100", "100100001", "001100001", "101100000", "000110001", "100110000", "001110000", "000100101", "100100100", "001100100", "100001001", "001001001", "101001000", "000011001", "100011000", "001011000",
"000001101", "100001100", "001001100", "000011100", "100000011", "001000011", "101000010", "000010011", "100010010", "001010010", "000000111", "100000110", "001000110", "000010110", "110000001", "011000001",
"111000000", "010010001", "110010000", "011010000", "010000101", "110000100", "011000100", "010101000", "010100010", "010001010", "000101010", "010010100"
};
private Container components = null;
private Font footerFont = new Font("Courier", 8f);
private Font headerFont = new Font("Courier", 18f);
private string headerText = "BarCode Demo";
private int height = 50;
private int leftMargin = 10;
private Panel panel1;
private PrintDocument printDocument1;
private bool showFooter;
private bool showHeader;
private int topMargin = 10;
private BarCodeWeight weight = BarCodeWeight.Small;
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
//ERROR ABOVE
}
public Form1()
{
InitializeComponent();
}
private void BarCodeCtrl_Resize(object sender, EventArgs e)
{
this.panel1.Invalidate();
}
protected override void Dispose(bool disposing)
{
if (disposing && (this.components != null))
{
this.components.Dispose();
}
base.Dispose(disposing);
}
private void InitializeComponent()
{
this.panel1 = new System.Windows.Forms.Panel();
this.printDocument1 = new System.Drawing.Printing.PrintDocument();
this.SuspendLayout();
//
// panel1
//
this.panel1.BackColor = System.Drawing.SystemColors.Window;
this.panel1.Dock = System.Windows.Forms.DockStyle.Fill;
this.panel1.Location = new System.Drawing.Point(0, 0);
this.panel1.Name = "panel1";
this.panel1.Size = new System.Drawing.Size(302, 228);
this.panel1.TabIndex = 0;
this.panel1.Paint += new System.Windows.Forms.PaintEventHandler(this.panel1_Paint);
//
// printDocument1
//
this.printDocument1.PrintPage += new System.Drawing.Printing.PrintPageEventHandler(this.printDocument1_PrintPage);
//
// Form1
//
this.ClientSize = new System.Drawing.Size(302, 228);
this.Controls.Add(this.panel1);
this.Name = "Form1";
this.Resize += new System.EventHandler(this.BarCodeCtrl_Resize);
this.ResumeLayout(false);
}
When i run this i am getting an error "Cannot convert from Bcode.Form1 to system.windows.forms.form
推荐答案
/+％*"；
私有字符串代码="1234567890";
私有字符串[] coded39Char =新字符串[] {
"000110100"，"100100001"，"001100001"，"101100000"，"000110001"，"100110000"，"001110000"，"000100101"，"100100100"，"001100100"，"100001001"，"001001001"，"101001000" ，" 000011001，" 100011000，" 001011000，
"000001101"，"100001100"，"001001100"，"000011100"，"100000011"，"001000011"，"101000010"，"000010011"，"100010010"，"001010010"，"000000111"，"100000110"，"001000110" ，" 000010110，" 110000001，" 011000001，
"111000000"，"010010001"，"110010000"，"011010000"，"010000101"，"110000100"，"011000100"，"010101000"，"010100010"，"010001010"，"000101010"，"010010100"
};
私有容器组件= null;
private Font footerFont = new Font("Courier"，8f);
private Font headerFont = new Font("Courier"，18f);
私有字符串headerText ="BarCode Demo";
私人int高度= 50;
private int leftMargin = 10;
专用面板panel1;
私有PrintDocument printDocument1;
私人布尔showFooter;
私人布尔showHeader;
private int topMargin = 10;
私人BarCodeWeight重量= BarCodeWeight.Small;
[STAThread]
静态void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
//以上错误
}
公共Form1()
{
InitializeComponent();
}
私有void BarCodeCtrl_Resize(对象发送者，EventArgs e)
{
this.panel1.Invalidate();
}
受保护的重写void Dispose(布尔处置)
{
if(处置&&(this.components！= null))
{
this.components.Dispose();
}
base.Dispose(处置);
}
私有void InitializeComponent()
{
this.panel1 =新的System.Windows.Forms.Panel();
this.printDocument1 =新的System.Drawing.Printing.PrintDocument();
this.SuspendLayout();
//
//panel1
//
this.panel1.BackColor = System.Drawing.SystemColors.Window;
this.panel1.Dock = System.Windows.Forms.DockStyle.Fill;
this.panel1.Location =新的System.Drawing.Point(0，0);
this.panel1.Name ="panel1";
this.panel1.Size = new System.Drawing.Size(302，228);
this.panel1.TabIndex = 0;
this.panel1.Paint + =新的System.Windows.Forms.PaintEventHandler(this.panel1_Paint);
//
//printDocument1
//
this.printDocument1.PrintPage + =新的System.Drawing.Printing.PrintPageEventHandler(this.printDocument1_PrintPage);
//
//Form1
//
this.ClientSize = new System.Drawing.Size(302，228);
this.Controls.Add(this.panel1);
this.Name ="Form1";
this.Resize + = new System.EventHandler(this.BarCodeCtrl_Resize);
this.ResumeLayout(false);
}
当我运行此程序时，出现错误无法从Bcode.Form1转换为system.windows.forms.form
/+%*";
private string code = "1234567890";
private string[] coded39Char = new string[] {
"000110100", "100100001", "001100001", "101100000", "000110001", "100110000", "001110000", "000100101", "100100100", "001100100", "100001001", "001001001", "101001000", "000011001", "100011000", "001011000",
"000001101", "100001100", "001001100", "000011100", "100000011", "001000011", "101000010", "000010011", "100010010", "001010010", "000000111", "100000110", "001000110", "000010110", "110000001", "011000001",
"111000000", "010010001", "110010000", "011010000", "010000101", "110000100", "011000100", "010101000", "010100010", "010001010", "000101010", "010010100"
};
private Container components = null;
private Font footerFont = new Font("Courier", 8f);
private Font headerFont = new Font("Courier", 18f);
private string headerText = "BarCode Demo";
private int height = 50;
private int leftMargin = 10;
private Panel panel1;
private PrintDocument printDocument1;
private bool showFooter;
private bool showHeader;
private int topMargin = 10;
private BarCodeWeight weight = BarCodeWeight.Small;
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
//ERROR ABOVE
}
public Form1()
{
InitializeComponent();
}
private void BarCodeCtrl_Resize(object sender, EventArgs e)
{
this.panel1.Invalidate();
}
protected override void Dispose(bool disposing)
{
if (disposing && (this.components != null))
{
this.components.Dispose();
}
base.Dispose(disposing);
}
private void InitializeComponent()
{
this.panel1 = new System.Windows.Forms.Panel();
this.printDocument1 = new System.Drawing.Printing.PrintDocument();
this.SuspendLayout();
//
// panel1
//
this.panel1.BackColor = System.Drawing.SystemColors.Window;
this.panel1.Dock = System.Windows.Forms.DockStyle.Fill;
this.panel1.Location = new System.Drawing.Point(0, 0);
this.panel1.Name = "panel1";
this.panel1.Size = new System.Drawing.Size(302, 228);
this.panel1.TabIndex = 0;
this.panel1.Paint += new System.Windows.Forms.PaintEventHandler(this.panel1_Paint);
//
// printDocument1
//
this.printDocument1.PrintPage += new System.Drawing.Printing.PrintPageEventHandler(this.printDocument1_PrintPage);
//
// Form1
//
this.ClientSize = new System.Drawing.Size(302, 228);
this.Controls.Add(this.panel1);
this.Name = "Form1";
this.Resize += new System.EventHandler(this.BarCodeCtrl_Resize);
this.ResumeLayout(false);
}
When i run this i am getting an error "Cannot convert from Bcode.Form1 to system.windows.forms.form
public partial class Form1 : UserControl
Application.Run(new Form1()); // fails because it's not a form
Form1应该从Form继承，而不是从UserControl继承.
Form1 should inherit from Form, not from UserControl.
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