一、编程方式修改被绑定的数据对象
//利用 DataBindingComplete 在数据绑定操作完成之后发生
private void dataGridView1_DataBindingComplete(object sender, DataGridViewBindingCompleteEventArgs e)
{
//编辑绑定列的显示定义，具体表现为 DataGridViewColumn 设置
for (int i = 0; i < this.dataGridView1.Columns.Count; i++)
{
this.dataGridView1.Columns["id"].DataPropertyName = "";
this.dataGridView1.Columns["id"].Visible = true;
}
//编辑绑定每行的单元格值，具体表现为 DataGridViewCell 设置
for (int i = 0; i < dataGridView1.Rows.Count; i++)
{
this.dataGridView1.Rows[i].Cells[0].Value = "1111";
}
}
Tips:
如何：操作 Windows 窗体 DataGridView 控件中的行
ms-help://MS.VSCC.v90/MS.MSDNQTR.v90.chs/dv_fxmclictl/html/522d8944-e073-4488-9673-923f0a8d7214.htm
如何：为 Windows 窗体 DataGridView 控件设置交替行样式
ms-help://MS.VSCC.v90/MS.MSDNQTR.v90.chs/dv_fxmclictl/html/699ef759-458c-426d-ac87-7c7e71b018ae.htm
如何：创建未绑定的 Windows 窗体 DataGridView 控件
ms-help://MS.VSCC.v90/MS.MSDNQTR.v90.chs/dv_fxmclictl/html/b5d4b47d-9a28-4d88-9dba-0a3c90fba71d.htm
如何：访问绑定到 Windows 窗体 DataGridView 行的对象（使用 DataGridViewRow.DataBoundItem 属性）
ms-help://MS.VSCC.v90/MS.MSDNQTR.v90.chs/dv_fxmclictl/html/0e05748f-4403-4eb8-8b2f-b098108181b5.htm
=====================================
[转] [04-18] winForm:DataGridView的一些技巧
http://bbs.dingdi.com/thread-791757-1-1.html
----------------------------------------
把对DataGridView操作的一些技巧总结和借鉴了一下，总结如下：
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;
}
}
}
18、数据提交到dataset中
DataSet ds = new DataSet("MyDataSet");
ds.Tables[biaom.Trim()].Rows.Clear();
try
{
for (int i = 0; i < dataGridView1.Rows.Count - 1; i++)
{
DataTable dt = ds.Tables[biaom.Trim()];
DataRow myrow = ds.Tables[biaom.Trim()].NewRow();
for (int j = 0; j < dataGridView1.Columns.Count; j++)
{
myrow[j] = Convert.ToString(dataGridView1.Rows.Cells[j].Value);
}
ds.Tables[biaom.Trim()].Rows.Add(myrow);
}
}
catch (Exception)
{
MessageBox.Show("输入类型错误！");
return;
}
DataGridView显示时一行都不选
dataGridView1.CurrentRow.Selected = false;
TreeView
1.单层子节点不可编辑
虽然在 TreeView 可以通过设定 LableEdit 属性来让节点不可被编辑,
但是如果要限定 单层节点不被编辑则麻烦的多,
这时候可以利用 节点编辑前事件来让特定的节点取消编辑
//编辑前事件, Level 1不可编辑
private void tvModel_BeforeLabelEdit(object sender, NodeLabelEditEventArgs e)
{
if (e.Node.Level == 1)
{
e.CancelEdit = true;
}
}
posted on 2009-05-11 22:38
黄小二 阅读(1125)
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