001.using System;
002.using System.Collections.Generic;
003.using System.ComponentModel;
004.using System.Data;
005.using System.Drawing;
006.using System.Linq;
007.using System.Text;
008.using System.Windows.Forms;
009.
010.namespace Test_Grid_CheckBox
011.{
012. public partial class Form1 : Form
013. {
014. CheckBox chkAll = new CheckBox();
015. private int headerCheckboxRightMargin;
016.
017. public Form1()
018. {
019. InitializeComponent();
020. }
021.
022. private void Form1_Load(object sender, EventArgs e)
023. {
024.
025. }
026.
027. public void AddCheckAll()
028. {
029. Rectangle rect;
030. try
031. {
032. rect = new Rectangle();
033. chkAll.Size = new Size(14, 14);
034. rect.X = dataGridView1.RowHeadersWidth + (dataGridView1.Columns[0].Width/2)-6;
035. rect.Y = 5;
036. chkAll.Location = rect.Location;
037. chkAll.CheckedChanged += new System.EventHandler(new EventHandler(ckBox_CheckedChanged));
038. dataGridView1.Controls.Add(chkAll);
039. }
040. catch (Exception ex)
041. {
042. }
043. }
044.
045. private void button1_Click(object sender, EventArgs e)
046. {
047. int i;
048. DataGridViewTextBoxColumn col1 = new DataGridViewTextBoxColumn();
049. DataGridViewTextBoxColumn col2 = new DataGridViewTextBoxColumn();
050. DataGridViewCheckBoxColumn chk1 = new DataGridViewCheckBoxColumn();
051.
052. chk1.Name = "chk1";
053. col1.Name = "col1";
054. col2.Name = "col2";
055. chk1.HeaderText = "";
056. col1.HeaderText = "col1";
057. col2.HeaderText = "col2";
058.
059. dataGridView1.Columns.Add(chk1);
060. dataGridView1.Columns.Add(col1);
061. dataGridView1.Columns.Add(col2);
062. dataGridView1.AllowUserToAddRows = false;
063. AddCheckAll();
064.
065.
066.
067. for (i = 0; i <= 100; i++)
068.
069. {
070. dataGridView1.Rows.Add(new object[] {0, i,"Test" });
071. }
072.
073. var checkboxHeaderCellRect = dataGridView1.GetCellDisplayRectangle(0, -1, false);
074. headerCheckboxRightMargin = (checkboxHeaderCellRect.Width - chkAll.Width) / 2;
075.
076. }
077.
078. private void ckBox_CheckedChanged(object sender, EventArgs e)
079. {
080.
081. foreach (DataGridViewRow dr in dataGridView1.Rows)
082. {
083. switch (chkAll.Checked)
084. {
085. case true:
086. dr.Cells[0].Value= 1;
087. break;
088. case false:
089. dr.Cells[0].Value = 0;
090. break;
091. default:
092. dr.Cells[0].Value = 0;
093. break;
094. }
095. }
096. dataGridView1.CurrentCell = null;
097. }
098.
099. private void dataGridView1_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
100. {
101. if (e.RowIndex == -1 && e.ColumnIndex == 0)
102. ResetHeaderCheckBoxLocation(e.ColumnIndex, e.RowIndex);
103. }
104.
105. private void ResetHeaderCheckBoxLocation(int ColumnIndex, int RowIndex)
106. {
107.
108. Rectangle oRectangle = this.dataGridView1.GetCellDisplayRectangle(ColumnIndex, RowIndex, false);
109.
110. Point oPoint = new Point();
111.
112. oPoint.X = oRectangle.Location.X + (oRectangle.Width - headerCheckboxRightMargin - chkAll.Width);
113. oPoint.Y = oRectangle.Location.Y + (oRectangle.Height - chkAll.Height) / 2 + 1;
114.
115. if (oPoint.X < oRectangle.X)
116. {
117. chkAll.Visible = false;
118. }
119. else
120. {
121. chkAll.Visible = true;
122. }
123. chkAll.Location = oPoint;
124.
125.
126. }
127.
128.
129. }
130.}
