DataGridView常用属性和方法

DataGridView常用属性:

只读属性设定
    datagridview.ReadOnly = True
行自动追加
    datagridview.AllowUserToAddRows = False
删除行允许
    datagridview.AllowUserToDeleteRows = False
行幅设置
    datagridview.AllowUserToResizeRows = False
    datagridview.ColumnHeadersHeightSizeMode =
    DataGridViewColumnHeadersHeightSizeMode.DisableResizing
行表示
    datagridview.RowHeadersVisible = False
行选择模式
    datagridview.SelectionMode = DataGridViewSelectionMode.FullRowSelect
复数行选择
    datagridview.MultiSelect = True
选择状态解除
    datagridview.ClearSelection()
文字设置位置
    datagridview.ColumnHeadersDefaultCellStyle.Alignment =
    DataGridViewContentAlignment.MiddleCenter
选择后行的颜色
    datagridview.DefaultCellStyle.SelectionBackColor = Color.GreenYellow
    datagridview.DefaultCellStyle.SelectionForeColor = Color.Black
行幅自动调整
    datagridview.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill



DataGridView常用方法=======================================================================================

1、自定义列
Customize Cells and Columns in the Windows Forms DataGridView Control by Extending Their
Behavior and Appearance
Host Controls in Windows Forms DataGridView Cells
继承 DataGridViewTextBoxCell 类生成新的Cell类，然后再继承 DataGridViewColumn 生成新的Column类，并指定
CellTemplate为新的Cell类。新生成的Column便可以增加到DataGridView中去。
2、自动适应列宽
Programmatically Resize Cells to Fit Content in the Windows Forms DataGridView Control
Samples：
DataGridView.AutoSizeColumns(
DataGridViewAutoSizeColumnCriteria.HeaderAndDisplayedRows);
DataGridView.AutoSizeColumn(
DataGridViewAutoSizeColumnCriteria.HeaderOnly,
2, false);
DataGridView.AutoSizeRow(
DataGridViewAutoSizeRowCriteria.Columns,
2, false);
DataGridView.AutoSizeRows(
DataGridViewAutoSizeRowCriteria.HeaderAndColumns,
0, dataGridView1.Rows.Count, false);
3、可以绑定并显示对象
Bind Objects to Windows Forms DataGridView Controls
4、可以改变表格线条风格
Change the Border and Gridline Styles in the Windows Forms DataGridView Control
Samples:
this.dataGridView1.GridColor = Color.BlueViolet;
this.dataGridView1.BorderStyle = BorderStyle.Fixed3D;
this.dataGridView1.CellBorderStyle = DataGridViewCellBorderStyle.None;
this.dataGridView1.RowHeadersBorderStyle = DataGridViewHeaderBorderStyle.Single;
this.dataGridView1.ColumnHeadersBorderStyle = DataGridViewHeaderBorderStyle.Single;
5、动态改变列是否显示，和动态改变列的显示顺序
Change the Order of the Columns in the Windows Forms DataGridView Control
Samples：
customersDataGridView.Columns["CustomerID"].Visible = false;
customersDataGridView.Columns["ContactName"].DisplayIndex = 0;
customersDataGridView.Columns["ContactTitle"].DisplayIndex = 1;
customersDataGridView.Columns["City"].DisplayIndex = 2;
customersDataGridView.Columns["Country"].DisplayIndex = 3;
customersDataGridView.Columns["CompanyName"].DisplayIndex = 4;
6、可以在列中显示图像
Display Images in Cells of the Windows Forms DataGridView Control
Samples：
Icon treeIcon = new Icon(this.GetType(), "tree.ico");
DataGridViewImageColumn iconColumn = new DataGridViewImageColumn ();
iconColumn.Image = treeIcon.ToBitmap();
iconColumn.Name = "Tree";
iconColumn.HeaderText = "Nice tree";
dataGridView1.Columns.Insert(2, iconColumn);
7、格式化显示内容:
Format Data in the Windows Forms DataGridView Control
Samples:
this.dataGridView1.Columns["UnitPrice"].DefaultCellStyle.Format = "c";
this.dataGridView1.Columns["ShipDate"].DefaultCellStyle.Format = "d";
this.dataGridView1.DefaultCellStyle.NullValue = "no entry";
this.dataGridView1.DefaultCellStyle.WrapMode = DataGridViewWrapMode.Wrap;
this.dataGridView1.Columns["CustomerName"].DefaultCellStyle.Alignment =
DataGridViewContentAlignment.MiddleRight;

8、在拖动列的滚动条时可以将指定的列冻结
Freeze Columns in the Windows Forms DataGridView Control
Samples：将指定列及以前的列固定不动
this.dataGridView1.Columns["AddToCartButton"].Frozen = true;
9、获取选择的单元格,行,列
Get the Selected Cells, Rows, and Columns in the Windows Forms DataGridView Control
Samples:
见msdn。
10、显示录入时出现的错误信息
Handle Errors that Occur During Data Entry in the Windows Forms DataGridView Control
Samples：
private void dataGridView1_DataError(object sender,
DataGridViewDataErrorEventArgs e)
{
// If the data source raises an exception when a cell value is
// commited, display an error message.
if (e.Exception != null &&
e.Context == DataGridViewDataErrorContext.Commit)
{
MessageBox.Show("CustomerID value must be unique.");
}
}
11、大数据量显示采用Virtual Mode
Implement Virtual Mode in the Windows Forms DataGridView Control
12、设置指定的列只读
Make Columns in the Windows Forms DataGridView Control Read-Only
Samples：
dataGridView1.Columns["CompanyName"].ReadOnly = true;

13、移去自动生成的列
Remove Autogenerated Columns from a Windows Forms DataGridView Control
Sample:
dataGridView1.AutoGenerateColumns = true;
dataGridView1.DataSource = customerDataSet;
dataGridView1.Columns.Remove ("Fax");
或：
dataGridView1.Columns["CustomerID"].Visible = false;
14、自定义选择模式
Set the Selection Mode of the Windows Forms DataGridView Control
Sample：
this.dataGridView1.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
this.dataGridView1.MultiSelect = false;
15、自定义设定光标进入单元格是否编辑模式（编辑模式）
Specify the Edit Mode for the Windows Forms DataGridView Control
this.dataGridView1.EditMode = DataGridViewEditMode.EditOnEnter;
16、新行指定默认值
Specify Default Values for New Rows in the Windows Forms DataGridView Control
Sample：
private void dataGridView1_DefaultValuesNeeded(object sender, System.Windows.Forms.DataGridViewRowEventArgs e)
{
e.Row.Cells["Region"].Value = "WA";
e.Row.Cells["City"].Value = "Redmond";
e.Row.Cells["PostalCode"].Value = "98052-6399";
e.Row.Cells["Region"].Value = "NA";
e.Row.Cells["Country"].Value = "USA";
e.Row.Cells["CustomerID"].Value = NewCustomerId();
}
17、数据验证
Validate Data in the Windows Forms DataGridView Control
Samples：
private void dataGridView1_CellValidating(object sender,
DataGridViewCellValidatingEventArgs e)
{
   // Validate the CompanyName entry by disallowing empty strings.
    if (dataGridView1.Columns[e.ColumnIndex].Name == "CompanyName")
    {
        if (e.FormattedValue.ToString() == String.Empty)
       {
          dataGridView1.Rows[e.RowIndex].ErrorText ="Company Name must not be empty";
          e.Cancel = true;
       }
    }
}