using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;namespace TEST
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Label label1;
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.TextBox textBox2;
private System.Windows.Forms.Label label3;
private System.Windows.Forms.TextBox textBox3;
private System.Windows.Forms.Button button1;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null; public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent(); //
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
} /// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
} static Double f(Double x)
{
Double fx=Convert.ToDouble(textBox5.Text);//这里出错了,如何改正?
return fx;
} #region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.label1 = new System.Windows.Forms.Label();
this.textBox1 = new System.Windows.Forms.TextBox();
this.label2 = new System.Windows.Forms.Label();
this.textBox2 = new System.Windows.Forms.TextBox();
this.label3 = new System.Windows.Forms.Label();
this.textBox3 = new System.Windows.Forms.TextBox();
this.button1 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// label1
//
this.label1.Location = new System.Drawing.Point(48, 24);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(72, 23);
this.label1.TabIndex = 0;
this.label1.Text = "f(x)=";
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(128, 24);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(200, 21);
this.textBox1.TabIndex = 1;
this.textBox1.Text = "";
//
// label2
//
this.label2.Location = new System.Drawing.Point(48, 56);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(72, 24);
this.label2.TabIndex = 2;
this.label2.Text = "x0=";
//
// textBox2
//
this.textBox2.Location = new System.Drawing.Point(128, 56);
this.textBox2.Name = "textBox2";
this.textBox2.Size = new System.Drawing.Size(200, 21);
this.textBox2.TabIndex = 1;
this.textBox2.Text = "";
this.textBox2.TextChanged += new System.EventHandler(this.textBox2_TextChanged);
//
// label3
//
this.label3.Location = new System.Drawing.Point(32, 200);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(56, 24);
this.label3.TabIndex = 3;
this.label3.Text = "f(x0)=";
//
// textBox3
//
this.textBox3.Location = new System.Drawing.Point(112, 200);
this.textBox3.Name = "textBox3";
this.textBox3.Size = new System.Drawing.Size(176, 21);
this.textBox3.TabIndex = 4;
this.textBox3.Text = "";
//
// button1
//
this.button1.Location = new System.Drawing.Point(176, 128);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(120, 48);
this.button1.TabIndex = 5;
this.button1.Text = "计算";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(368, 368);
this.Controls.Add(this.button1);
this.Controls.Add(this.textBox3);
this.Controls.Add(this.label3);
this.Controls.Add(this.label2);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.label1);
this.Controls.Add(this.textBox2);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false); }
#endregion /// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
} private void textBox2_TextChanged(object sender, System.EventArgs e)
{
}
private void button1_Click(object sender, System.EventArgs e)
{
if((textBox1.Text=="")||(textBox2.Text==""))
MessageBox.Show("请输入数据!");
else
{
Double x=0;
x=Convert.ToDouble(textBox2.Text);
String fx=textBox1.Text;
textBox3.Text=f(x).ToString();
}
}
}
}
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;namespace TEST
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Label label1;
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.TextBox textBox2;
private System.Windows.Forms.Label label3;
private System.Windows.Forms.TextBox textBox3;
private System.Windows.Forms.Button button1;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null; public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent(); //
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
} /// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
} static Double f(Double x)
{
Double fx=Convert.ToDouble(textBox5.Text);//这里出错了,如何改正?
return fx;
} #region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.label1 = new System.Windows.Forms.Label();
this.textBox1 = new System.Windows.Forms.TextBox();
this.label2 = new System.Windows.Forms.Label();
this.textBox2 = new System.Windows.Forms.TextBox();
this.label3 = new System.Windows.Forms.Label();
this.textBox3 = new System.Windows.Forms.TextBox();
this.button1 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// label1
//
this.label1.Location = new System.Drawing.Point(48, 24);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(72, 23);
this.label1.TabIndex = 0;
this.label1.Text = "f(x)=";
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(128, 24);
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(200, 21);
this.textBox1.TabIndex = 1;
this.textBox1.Text = "";
//
// label2
//
this.label2.Location = new System.Drawing.Point(48, 56);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(72, 24);
this.label2.TabIndex = 2;
this.label2.Text = "x0=";
//
// textBox2
//
this.textBox2.Location = new System.Drawing.Point(128, 56);
this.textBox2.Name = "textBox2";
this.textBox2.Size = new System.Drawing.Size(200, 21);
this.textBox2.TabIndex = 1;
this.textBox2.Text = "";
this.textBox2.TextChanged += new System.EventHandler(this.textBox2_TextChanged);
//
// label3
//
this.label3.Location = new System.Drawing.Point(32, 200);
this.label3.Name = "label3";
this.label3.Size = new System.Drawing.Size(56, 24);
this.label3.TabIndex = 3;
this.label3.Text = "f(x0)=";
//
// textBox3
//
this.textBox3.Location = new System.Drawing.Point(112, 200);
this.textBox3.Name = "textBox3";
this.textBox3.Size = new System.Drawing.Size(176, 21);
this.textBox3.TabIndex = 4;
this.textBox3.Text = "";
//
// button1
//
this.button1.Location = new System.Drawing.Point(176, 128);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(120, 48);
this.button1.TabIndex = 5;
this.button1.Text = "计算";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(368, 368);
this.Controls.Add(this.button1);
this.Controls.Add(this.textBox3);
this.Controls.Add(this.label3);
this.Controls.Add(this.label2);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.label1);
this.Controls.Add(this.textBox2);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false); }
#endregion /// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
} private void textBox2_TextChanged(object sender, System.EventArgs e)
{
}
private void button1_Click(object sender, System.EventArgs e)
{
if((textBox1.Text=="")||(textBox2.Text==""))
MessageBox.Show("请输入数据!");
else
{
Double x=0;
x=Convert.ToDouble(textBox2.Text);
String fx=textBox1.Text;
textBox3.Text=f(x).ToString();
}
}
}
}
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static Double f(String Text)
{
Double fx=Convert.ToDouble(Text);
return fx;
}或
static Double f(TextBox Text)
{
Double fx=Convert.ToDouble(Text.text);
return fx;
}
static Double f(String Text)
{
Double fx=Convert.ToDouble(Text);
return fx;
}
后,编译可以通过,但无法正常运行,得到想要的结果。