DataGridView的一些技巧
DataGridView的一些技巧 最近一直跟DataGridView打交道，突然觉得很多技巧性的东西很模糊，经过最近的个人实验操作和从网上查到的资料 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[i].Cells[j].Value); } ds.Tables[biaom.Trim()].Rows.Add(myrow); } }
catch
(Exception) { MessageBox.Show(
"
输入类型错误！
"
);
return
; }