用Winform做的一个日历

 

下面的是效果图

其实很简单，首先要知道这个月的第一天是礼拜几

 

int month = Month.SelectedIndex + 1 == 0 ? 1 : Month.SelectedIndex + 1; int year = Year.SelectedIndex + baseyear; dt.Clear(); int day = 1, begin = 0; DateTime dat = new DateTime(year, month, day); System.DayOfWeek dw = dat.DayOfWeek;

 

还要知道这个月有多少天

int allday = 1; DateTime dd = dat; while (dd.Month == dat.Month) { allday++; dd = dd.AddDays(1); }

剩下的就只是向datatable里加数据了。

全部代码

Calendar.cs

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; namespace Calendar { public partial class Calendar : Form { public Calendar() { InitializeComponent(); } private int baseyear = 1990;//the first year in here. private void Calendar_Load(object sender, EventArgs e) { List<int> year = new List<int>(); for (int i = baseyear; i < baseyear + 30; i++) year.Add(i); Year.DataSource = year; List<string> month = new List<string>(); month.AddRange(new string[] { "January", "February", "Marth", "April", "May", "June", "July", "August", "September", "October ", "November", "December"}); Month.DataSource = month; dt.Columns.Add("Sun", typeof(int)); dt.Columns.Add("Mon", typeof(int)); dt.Columns.Add("Tue", typeof(int)); dt.Columns.Add("Wed", typeof(int)); dt.Columns.Add("Thu", typeof(int)); dt.Columns.Add("Fri", typeof(int)); dt.Columns.Add("Sat", typeof(int)); DT_changed(); } private void Year_SelectedIndexChanged(object sender, EventArgs e) { DT_changed(); } private void Month_SelectedIndexChanged(object sender, EventArgs e) { DT_changed(); } private DataTable dt = new DataTable(); private void DT_changed() { int month = Month.SelectedIndex + 1 == 0 ? 1 : Month.SelectedIndex + 1; int year = Year.SelectedIndex + baseyear; dt.Clear(); int day = 1, begin = 0; DateTime dat = new DateTime(year, month, day); System.DayOfWeek dw = dat.DayOfWeek; switch (dw) { case DayOfWeek.Sunday: begin = 0; break; case DayOfWeek.Monday: begin = 1; break; case DayOfWeek.Tuesday: begin = 2; break; case DayOfWeek.Wednesday: begin = 3; break; case DayOfWeek.Thursday: begin = 4; break; case DayOfWeek.Friday: begin = 5; break; case DayOfWeek.Saturday: begin = 6; break; default: begin = -1; break; } int allday = 1; DateTime dd = dat; while (dd.Month == dat.Month) { allday++; dd = dd.AddDays(1); } while (day < allday) { DataRow dr = dt.NewRow(); while (begin < 7 && day < allday) { dr[begin] = day; day++; begin++; } dt.Rows.Add(dr); begin = 0; } dataGridView1.DataSource = null; dataGridView1.DataSource = dt; } } }

 

Calendar.Designer.cs

namespace Calendar { partial class Calendar { /// <summary> /// 必需的设计器变量。 /// </summary> private System.ComponentModel.IContainer components = null; /// <summary> /// 清理所有正在使用的资源。 /// </summary> /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param> protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dispose(); } base.Dispose(disposing); } #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() { System.Windows.Forms.DataGridViewCellStyle dataGridViewCellStyle2 = new System.Windows.Forms.DataGridViewCellStyle(); this.dataGridView1 = new System.Windows.Forms.DataGridView(); this.Month = new System.Windows.Forms.ComboBox(); this.Year = new System.Windows.Forms.ComboBox(); ((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).BeginInit(); this.SuspendLayout(); // // dataGridView1 // this.dataGridView1.AllowUserToAddRows = false; this.dataGridView1.AllowUserToDeleteRows = false; this.dataGridView1.AutoSizeColumnsMode = System.Windows.Forms.DataGridViewAutoSizeColumnsMode.AllCells; this.dataGridView1.BackgroundColor = System.Drawing.Color.White; this.dataGridView1.CellBorderStyle = System.Windows.Forms.DataGridViewCellBorderStyle.SunkenHorizontal; this.dataGridView1.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize; this.dataGridView1.Location = new System.Drawing.Point(12, 61); this.dataGridView1.Name = "dataGridView1"; this.dataGridView1.ReadOnly = true; dataGridViewCellStyle2.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(192)))), ((int)(((byte)(255)))), ((int)(((byte)(192))))); dataGridViewCellStyle2.ForeColor = System.Drawing.Color.Black; this.dataGridView1.RowsDefaultCellStyle = dataGridViewCellStyle2; this.dataGridView1.RowTemplate.Height = 23; this.dataGridView1.Size = new System.Drawing.Size(383, 140); this.dataGridView1.TabIndex = 0; // // Month // this.Month.BackColor = System.Drawing.SystemColors.Window; this.Month.FormattingEnabled = true; this.Month.Location = new System.Drawing.Point(55, 21); this.Month.Name = "Month"; this.Month.Size = new System.Drawing.Size(90, 20); this.Month.TabIndex = 1; this.Month.SelectedIndexChanged += new System.EventHandler(this.Month_SelectedIndexChanged); // // Year // this.Year.FormattingEnabled = true; this.Year.Location = new System.Drawing.Point(188, 21); this.Year.Name = "Year"; this.Year.Size = new System.Drawing.Size(105, 20); this.Year.TabIndex = 2; this.Year.SelectedIndexChanged += new System.EventHandler(this.Year_SelectedIndexChanged); // // Calendar // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(409, 216); this.Controls.Add(this.Year); this.Controls.Add(this.Month); this.Controls.Add(this.dataGridView1); this.Name = "Calendar"; this.Text = "Calendar"; this.Load += new System.EventHandler(this.Calendar_Load); ((System.ComponentModel.ISupportInitialize)(this.dataGridView1)).EndInit(); this.ResumeLayout(false); } #endregion private System.Windows.Forms.DataGridView dataGridView1; private System.Windows.Forms.ComboBox Month; private System.Windows.Forms.ComboBox Year; } }