C# DatagridView常用操作汇总
本文汇总了C#中DatagridView的常用操作，有助于读者加深对C#DatagridView用法的理解，具体如下：
1、(最基本的技巧)、获取某列中的某行(某单元格)中的内容
this.currentposition=this.dataGridView1.BindingContext [this.dataGridView1.DataSource,this.dataGridView1.DataMember].Position; bookContent=this.database.dataSet.Tables[0].Rows [this.currentposition][21].ToString().Trim(); MessageBox.Show(bookContent);
2、自定义列
//定义列宽 this.dataGridView1.Columns[0].Width=80; this.dataGridView1.Columns[1].Width=80; this.dataGridView1.Columns[2].Width=180; this.dataGridView1.Columns[3].Width=120; this.dataGridView1.Columns[4].Width=120; CustomizeCellsandColumnsintheWindowsFormsDataGridViewControlbyExtendingTheir BehaviorandAppearance HostControlsinWindowsFormsDataGridViewCells
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。
3、自动适应列宽
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);
4、可以绑定并显示对象
BindObjectstoWindowsFormsDataGridViewControls
5、可以改变表格线条风格
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;
6、动态改变列是否显示，和动态改变列的显示顺序
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;
7、可以在列中显示图像
IcontreeIcon=newIcon(this.GetType(),"tree.ico"); DataGridViewImageColumniconColumn=newDataGridViewImageColumn(); iconColumn.Image=treeIcon.ToBitmap(); iconColumn.Name="Tree"; iconColumn.HeaderText="Nicetree"; dataGridView1.Columns.Insert(2,iconColumn);
8、格式化显示内容:
this.dataGridView1.Columns["UnitPrice"].DefaultCellStyle.Format="c"; this.dataGridView1.Columns["ShipDate"].DefaultCellStyle.Format="d"; this.dataGridView1.DefaultCellStyle.NullValue="noentry"; this.dataGridView1.DefaultCellStyle.WrapMode=DataGridViewWrapMode.Wrap; this.dataGridView1.Columns["CustomerName"].DefaultCellStyle.Alignment=DataGridViewContentAlignment.MiddleRight;
9、将指定列及以前的列固定不动
this.dataGridView1.Columns["AddToCartButton"].Frozen=true;
10、显示录入时出现的错误信息
privatevoiddataGridView1_DataError(objectsender,
DataGridViewDataErrorEventArgse)
{
//Ifthedatasourceraisesanexceptionwhenacellvalueis
//commited,displayanerrormessage.
if(e.Exception!=null&&
e.Context==DataGridViewDataErrorContext.Commit)
{
MessageBox.Show("CustomerIDvaluemustbeunique.");
}}
11、大数据量显示采用VirtualMode
ImplementVirtualModeintheWindowsFormsDataGridViewControl
12、设置指定的列只读
dataGridView1.Columns["CompanyName"].ReadOnly=true;
13、移去自动生成的列
dataGridView1.AutoGenerateColumns=true;
dataGridView1.DataSource=customerDataSet;
dataGridView1.Columns.Remove("Fax");
或：
dataGridView1.Columns["CustomerID"].Visible=false;
14、自定义选择模式
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）
this.dataGridView1.EditMode=DataGridViewEditMode.EditOnEnter;
16、新行指定默认值
privatevoiddataGridView1_DefaultValuesNeeded
(objectsender,System.Windows.Forms.DataGridViewRowEventArgse)
{
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
privatevoiddataGridView1_CellValidating(objectsender,
DataGridViewCellValidatingEventArgse)
{
//ValidatetheCompanyNameentrybydisallowingemptystrings.
if(dataGridView1.Columns[e.ColumnIndex].Name=="CompanyName")
{
if(e.FormattedValue.ToString()==String.Empty)
{
dataGridView1.Rows[e.RowIndex].ErrorText=
"CompanyNamemustnotbeempty";
e.Cancel=true;
}}}
18、数据提交到dataset中
DataSetds=newDataSet("MyDataSet");
ds.Tables[biaom.Trim()].Rows.Clear();
try
{
for(inti=0;i<dataGridView1.Rows.Count-1;i++)
{
DataTabledt=ds.Tables[biaom.Trim()];
DataRowmyrow=ds.Tables[biaom.Trim()].NewRow();
for(intj=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;
}