1). 添加一個(gè)快捷菜單contextMenuStrip1；
2). 給dataGridView1的CellMouseDown事件添加處理程序：
private void DataGridView1_CellMouseDown(object sender, DataGridViewCellMouseEventArgs e)
{
if (e.Button == MouseButtons.Right)
{
if (e.RowIndex >= 0)
{
//若行已是選中狀態(tài)就不再進(jìn)行設(shè)置
if (dataGridView1.Rows[e.RowIndex].Selected == false)
{
dataGridView1.ClearSelection();
dataGridView1.Rows[e.RowIndex].Selected = true;
}
//只選中一行時(shí)設(shè)置活動(dòng)單元格
if (dataGridView1.SelectedRows.Count == 1)
{
dataGridView1.CurrentCell = dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex];
}
//彈出操作菜單
contextMenuStrip1.Show(MousePosition.X, MousePosition.Y);
}
}
}
2).復(fù)制選中單元格的內(nèi)容到剪貼板Clipboard.SetDataObject(dataGridView1.GetClipboardContent());
3).只顯示自定義列dataGridView1.AutoGenerateColumns = false;//必須在代碼中設(shè)置
4).顯示圖片通常，我們將圖片路徑保存在數(shù)據(jù)庫(kù)中，但在dataGridView1中要顯示圖片，可以進(jìn)行如下操作：
①.添加一個(gè)DataGridViewTextBoxColumn類型的列，Name=Path,DataPropertyName=Pic,Visible=False；
②.添加一個(gè)DataGridViewImageColumn類型的列，Name=Pic；
③.dataGridView1控件DataBindingComplete事件處理程序如下：
private void DataGridView1_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e)
{
Image image1 = null;
Image image2 = null;
string path = string.Empty;
for (int i = 0; i < dataGridView1.Rows.Count; i++)
{
path = @"F:\" + dataGridView1.Rows[i].Cells["Path"].Value;
if (File.Exists(path))
{
image1 = Image.FromFile(path);
image2 = new Bitmap(image1, 120, 120);//重設(shè)大小
dataGridView1.Rows[i].Cells["Pic"].Value = image2;
//((DataGridViewImageCell)dataGridView1.Rows[i].Cells["Pic"]).Value = image2;
}
}
}
5).當(dāng)網(wǎng)格未填充滿控件時(shí)，畫線來(lái)填充空白區(qū)域/// <summary>
/// 繪制網(wǎng)格填充空白區(qū)域
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
public void CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
{
DataGridView myDataGridView = (DataGridView)sender;
if (myDataGridView.Rows.Count > 0)
{
int i = myDataGridView.ColumnHeadersHeight;//標(biāo)題行高
int j = myDataGridView.Rows.GetRowsHeight(DataGridViewElementStates.Visible); //所有可見(jiàn)行總高
int k = myDataGridView.Height; //控件高度
int l = myDataGridView.Rows.GetLastRow(DataGridViewElementStates.Visible);//最后一行索引
int count = myDataGridView.Columns.Count;//列總數(shù)
int width = 0;
//當(dāng)網(wǎng)格未充滿控件時(shí)才畫線
if (i + j < k)
{
using (Brush gridBrush = new SolidBrush(myDataGridView.GridColor))
{
using (Pen gridLinePen = new Pen(gridBrush))
{
//處理標(biāo)題列
if (myDataGridView.RowHeadersVisible)
{
width = myDataGridView.RowHeadersWidth;
e.Graphics.DrawLine(gridLinePen, width, i + j, width, k);
}
else
{
width = 1;
}
//處理正常列
for (int index = 0; index < count; index++)
{
if (myDataGridView.Columns[index].Visible)
{
width += myDataGridView.Columns[index].Width;
e.Graphics.DrawLine(gridLinePen, width, i + j, width, k);
}
}
}
}
}
}
}
手動(dòng)添加列，再在編輯列界面中逐個(gè)設(shè)置寬度。注意AutoSizeColumnsMode的值必須為DataGridViewAutoSizeColumnsMode.None，否則自定義寬度不能生效！
7).單元格內(nèi)容格式化private void dataGridView1_CellFormatting(object sender, DataGridViewCellFormattingEventArgs e)
{
DataGridView myDataGridView = (DataGridView)sender;
if (myDataGridView.Columns["ID"].Index == e.ColumnIndex)
{
if(e.Value != null && !string.IsNullOrEmpty(e.Value.ToString()))
e.Value = "BH" + string.Format("{0:D8}", int.Parse(e.Value.ToString()));
}
}
8).打造一個(gè)漂亮的DataGridView//樣式
dataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.None;//列寬不自動(dòng)調(diào)整,手工添加列
dataGridView1.RowHeadersWidth = 12;//行標(biāo)題寬度固定12
dataGridView1.RowHeadersWidthSizeMode = DataGridViewRowHeadersWidthSizeMode.DisableResizing;//不能用鼠標(biāo)調(diào)整列標(biāo)頭寬度
dataGridView1.AlternatingRowsDefaultCellStyle.BackColor = Color.LemonChiffon;//奇數(shù)行背景色
dataGridView1.BackgroundColor = Color.White;//控件背景色
dataGridView1.ColumnHeadersDefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter;//列標(biāo)題居中顯示
dataGridView1.DefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter;//單元格內(nèi)容居中顯示
//行為
dataGridView1.AutoGenerateColumns = false;//不自動(dòng)創(chuàng)建列
dataGridView1.AllowUserToAddRows = false;//不啟用添加
dataGridView1.ReadOnly = true;//不啟用編輯
dataGridView1.AllowUserToDeleteRows = false;//不啟用刪除
dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;//單擊單元格選中整行
dataGridView1.MultiSelect = false;//不能多選
9).判斷有無(wú)滾動(dòng)條//垂直滾動(dòng)條
if (dataGridView1.Rows.GetRowsHeight(DataGridViewElementStates.None) > dataGridView1.Height)
MessageBox.Show("有");
else
MessageBox.Show("無(wú)");
//水平滾動(dòng)條
if(dataGridView1.Columns.GetColumnsWidth(DataGridViewElementStates.None) > dataGridView1.Width)
MessageBox.Show("有");
else
MessageBox.Show("無(wú)");
10).為什么列標(biāo)題總不居中？已經(jīng)將列標(biāo)題默認(rèn)對(duì)齊方式設(shè)置為居中：
dataGridView1.ColumnHeadersDefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter;//列標(biāo)題居中顯示
但實(shí)際的效果總是偏左了一點(diǎn)，原因是列可以進(jìn)行排序，排序標(biāo)志符號(hào)在列標(biāo)題上占了空間。逐列按下邊設(shè)置可去掉：
dataGridView1.Columns[i].SortMode = DataGridViewColumnSortMode.NotSortable;
