C#中窗体间参数传递实现增删改的例子
时间：2014-05-23 10:41:47
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此例子中传递的变量有string type，string text，储存在结构数组中；static int i储存在Sta类中（如果在外面声明，调用它老出错），里面有geti和seti函数来操纵它。
各个窗体实现功能及截图：
各窗体代码如下：
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; using System.Data.OleDb; using System.IO; using System.Data.SqlClient; namespace 电子便签 { public partial class menu : Form { public menu() { InitializeComponent(); } public class Sta //建立储存静态变量的类 { public static int i = 0; public int geti() { return i; } public void seti(int a) { i = a; } } public Sta sta = new Sta(); //将此类实例化 public struct chucun { public string type; public string text; } public chucun[] cc = new chucun[10]; //结构数组用来储存内容，最大储存单位为10个 private void button1_Click(object sender, EventArgs e) //打开增加信息add窗体 { add form2 = new add(this); form2.Show(); } private void button2_Click(object sender, EventArgs e) //打开删除信息delete窗体 { delete form4 = new delete(this); form4.Show(); } private void button3_Click(object sender, EventArgs e) //打开修改信息revise窗体 { revise form5 = new revise(this); form5.Show(); } private void button4_Click(object sender, EventArgs e) //设置字体样式 { FontDialog f = new FontDialog(); if (f.ShowDialog() == DialogResult.OK) { textBox1.Font = f.Font; } } private void button5_Click(object sender, EventArgs e) //设置字体颜色 { ColorDialog cd = new ColorDialog(); if (cd.ShowDialog() == DialogResult.OK) { textBox1.ForeColor = cd.Color; } } private void button6_Click(object sender, EventArgs e) //设置背景 { OpenFileDialog ofd = new OpenFileDialog(); ofd.Filter = "图片文件(*.jpg)|*.jpg|All files(*.*)|*.*"; if (ofd.ShowDialog() == DialogResult.OK) { //path = ofd.FileName; this.BackgroundImage = Image.FromFile(ofd.FileName); } //this.BackgroundImage = Image.FromFile(path); } private void Form1_Load(object sender, EventArgs e) //wait窗体为打开前奏 { Waiting wait = new Waiting(); wait.Show(); wait.Activate(); Application.DoEvents(); System.Threading.Thread.Sleep(1000); wait.Close(); wait.Dispose(); //conn.ConnectionString = CString; } private void button7_Click(object sender, EventArgs e) //将textBox内容存储到text文件中 { FileStream fs = new FileStream("abc.text", FileMode.Create, FileAccess.Write); StreamWriter sw = new StreamWriter(fs, Encoding.Default); sw.WriteLine(textBox1.Text); sw.Close(); } } }
1 using System; 2 using System.Collections.Generic; 3 using System.ComponentModel; 4 using System.Data; 5 using System.Drawing; 6 using System.Linq; 7 using System.Text; 8 using System.Windows.Forms; 9 using System.Data.OleDb; 10 namespace 电子便签 11 { 12 13 public partial class add : Form 14 { 15 private menu mF_Form; 16 public add(menu myForm) 17 { 18 InitializeComponent(); 19 this.mF_Form = myForm; 20 } //将窗体一对象作为窗体二属性 21 22 private void button1_Click(object sender, EventArgs e) 23 { 24 if (string.IsNullOrEmpty(textBox1.Text) | string.IsNullOrEmpty(textBox2.Text)) //判断textBox内容是否为空 25 { 26 string s = "输入不能为空"; 27 MessageBox.Show(s); 28 } 29 else 30 { 31 string s1 = textBox1.Text; 32 string s2 = textBox2.Text; 33 mF_Form.cc[mF_Form.sta.geti()].type = s1; 34 mF_Form.cc[mF_Form.sta.geti()].text = s2; //从文本框中读取相关内容 35 36 string sum = ""; 37 for (int i2 = 0; i2 <= mF_Form.sta.geti(); i2++) //将目前所有类型和内容输出在meau窗体的textBox中 38 { 39 sum = sum + mF_Form.cc[i2].type + "：\r\n " + mF_Form.cc[i2].text + "\r\n"; 40 } 41 mF_Form.textBox1.Text = sum; 42 int ii = mF_Form.sta.geti() + 1; //由于添加了一组信息，静态变量加1 43 mF_Form.sta.seti(ii); 44 this.Close(); 45 } 46 } 47 48 private void button2_Click(object sender, EventArgs e) 49 { 50 this.Close(); 51 } 52 53 54 55 56 } 57 }
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 电子便签 { public partial class delete : Form { private menu mF_Form; CheckBox[] checkBox = new CheckBox[5]; //声明并实例化复选框 public delete(menu myForm) { InitializeComponent(); mF_Form = myForm; if (mF_Form.sta.geti() == 0) { Label label = new Label(); label.Location = new System.Drawing.Point(35, 49); //label控件显示位置 label.Text = "无可删除类型"; this.Controls.Add(label); } else { for (int i4 = 0; i4 < mF_Form.sta.geti(); i4++) //动态添加复选框 { //textBox1.Text = "sfsdfsdfs"; checkBox[i4] = new CheckBox(); checkBox[i4].Location = new System.Drawing.Point(35, 49+20*i4); //控件显示在同一列中 checkBox[i4].Size = new System.Drawing.Size(this.Width, 16); //同一宽度 checkBox[i4].Text = myForm.cc[i4].type; this.Controls.Add(checkBox[i4]); } } } private void button1_Click(object sender, EventArgs e) { for (int i = 0; i <= mF_Form.sta.geti(); i++) //遍历所有 { if (checkBox[i].Checked) //发现复选框被选中 { for (int ii = i; ii < mF_Form.sta.geti(); ii++) //将后面的前移，同时静态变量-1 { mF_Form.cc[ii].type = mF_Form.cc[ii + 1].type; mF_Form.cc[ii].text = mF_Form.cc[ii + 1].text; } mF_Form.sta.seti(mF_Form.sta.geti() -1); } } //将删除后的显示在menu窗体的textBox中 string sum =""; for (int i2 = 0; i2 <mF_Form.sta.geti(); i2++) { sum = sum + mF_Form.cc[i2].type + "：\r\n " + mF_Form.cc[i2].text + "\r\n"; } mF_Form.textBox1.Text = sum; this.Close(); } private void button2_Click(object sender, EventArgs e) { this.Close(); } private void delete_Load(object sender, EventArgs e) { } } }
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 电子便签 { public partial class revise : Form { private menu mF_Form; CheckBox[] checkBox = new CheckBox[10]; //声明和实例化复选框空间 public revise(menu myForm) { InitializeComponent(); mF_Form = myForm; if (mF_Form.sta.geti() == 0) //没有内容 { Label label = new Label(); label.Location = new System.Drawing.Point(35, 49); label.Text = "无可删除类型"; this.Controls.Add(label); } else { for (int i4 = 0; i4 < mF_Form.sta.geti(); i4++) //动态添加复选框 { //textBox1.Text = "sfsdfsdfs"; checkBox[i4] = new CheckBox(); checkBox[i4].Location = new System.Drawing.Point(35, 49 + 20 * i4); checkBox[i4].Size = new System.Drawing.Size(this.Width, 16); checkBox[i4].Text = myForm.cc[i4].type; this.Controls.Add(checkBox[i4]); } } } private void button2_Click(object sender, EventArgs e) //窗体关闭 { this.Close(); } private void button1_Click(object sender, EventArgs e) { for (int i5 = 0; i5 < mF_Form.sta.geti(); i5++) { if (this.checkBox[i5].Checked) { mF_Form.cc[i5].text = textBox1.Text; //修改选择项的内容 } } //将修改后的显示在menu窗体的textBox中 string sum = ""; for (int i2 = 0; i2 < mF_Form.sta.geti(); i2++) { sum = sum + mF_Form.cc[i2].type + "：\r\n " + mF_Form.cc[i2].text + "\r\n"; } mF_Form.textBox1.Text = sum; this.Close(); } } }
其实使用数据库可以更方便的实现，而且数据库也可以体现出技术。这是在还没学会数据库做的，现在快交作业了，必须用数据库了，整个代码必须更新了。把这些代码提出来和大家共享一下。
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