知识大全 C#中对DatagridView的部分常用操作

Posted 2022-07-17 内容

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　　 (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 dataGridView BindingContext

　　[this dataGridView DataSource this dataGridView DataMember] Position;bookContent = this database dataSet Tables[ ] Rows

　　[this currentposition][ ] ToString() Trim();MessageBox Show(bookContent);

　　//定义列宽this dataGridView Columns[ ] Width = ;this dataGridView Columns[ ] Width = ;this dataGridView Columns[ ] Width = ;this dataGridView Columns[ ] Width = ;this dataGridView Columns[ ] Width = ;Customize Cells and Columns in the Windows Forms DataGridView Control by Extending TheirBehavior and AppearanceHost 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

　　自动适应列宽

　　Programmatically Resize Cells to Fit Content in the Windows Forms DataGridView ControlSamples DataGridView AutoSizeColumns(DataGridViewAutoSizeColumnCriteria HeaderAndDisplayedRows);DataGridView AutoSizeColumn(DataGridViewAutoSizeColumnCriteria HeaderOnly false);DataGridView AutoSizeRow(DataGridViewAutoSizeRowCriteria Columns false);DataGridView AutoSizeRows(DataGridViewAutoSizeRowCriteria HeaderAndColumns dataGridView Rows Count false);

　　可以绑定并显示对象

　　Bind Objects to Windows Forms DataGridView Controls

　　可以改变表格线条风格

　　Change the Border and Gridline Styles in the Windows Forms DataGridView ControlSamples:this dataGridView GridColor = Color BlueViolet;this dataGridView BorderStyle = BorderStyle Fixed D;this dataGridView CellBorderStyle = DataGridViewCellBorderStyle None;this dataGridView RowHeadersBorderStyle = DataGridViewHeaderBorderStyle Single;this dataGridView ColumnHeadersBorderStyle = DataGridViewHeaderBorderStyle Single;

　　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 ControlSamples customersDataGridView Columns[ CustomerID ] Visible = false;customersDataGridView Columns[ ContactName ] DisplayIndex = ;customersDataGridView Columns[ ContactTitle ] DisplayIndex = ;customersDataGridView Columns[ City ] DisplayIndex = ;customersDataGridView Columns[ Country ] DisplayIndex = ;customersDataGridView Columns[ CompanyName ] DisplayIndex = ;

　　可以在列中显示图像

　　Display Images in Cells of the Windows Forms DataGridView ControlSamples Icon treeIcon = new Icon(this GetType() tree ico );DataGridViewImageColumn iconColumn = new DataGridViewImageColumn ();iconColumn Image = treeIcon ToBitmap();iconColumn Name = Tree ;iconColumn HeaderText = Nice tree ;dataGridView Columns Insert( iconColumn);

　　格式化显示内容:

　　Format Data in the Windows Forms DataGridView ControlSamples:this dataGridView Columns[ UnitPrice ] DefaultCellStyle Format = c ;this dataGridView Columns[ ShipDate ] DefaultCellStyle Format = d ;this dataGridView DefaultCellStyle NullValue = no entry ;this dataGridView DefaultCellStyle WrapMode = DataGridViewWrapMode Wrap;this dataGridView Columns[ CustomerName ] DefaultCellStyle Alignment =DataGridViewContentAlignment MiddleRight;

　　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 ControlSamples 将指定列及以前的列固定不动this dataGridView Columns[ AddToCartButton ] Frozen = true;

　　获取选择的单元格行列

　　Get the Selected Cells Rows and Columns in the Windows Forms DataGridView ControlSamples:

　　显示录入时出现的错误信息

　　Handle Errors that Occur During Data Entry in the Windows Forms DataGridView ControlSamples private void dataGridView _DataError(object sender DataGridViewDataErrorEventArgs e)// If the data source raises an exception when a cell value is// mited display an error message if (e Exception != null &&e Context == DataGridViewDataErrorContext Commit)MessageBox Show( CustomerID value must be unique );

　　大数据量显示采用Virtual Mode

　　Implement Virtual Mode in the Windows Forms DataGridView Control

　　设置指定的列只读

　　Make Columns in the Windows Forms DataGridView Control Read OnlySamples dataGridView Columns[ CompanyName ] ReadOnly = true;

　　移去自动生成的

　　列

　　Remove Autogenerated Columns from a Windows Forms DataGridView ControlSample:dataGridView AutoGenerateColumns = true;dataGridView DataSource = customerDataSet;dataGridView Columns Remove ( Fax );或 dataGridView Columns[ CustomerID ] Visible = false;

　　自定义选择模式

　　Set the Selection Mode of the Windows Forms DataGridView ControlSample this dataGridView SelectionMode = DataGridViewSelectionMode FullRowSelect;this dataGridView MultiSelect = false;

　　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 Controlthis dataGridView EditMode = DataGridViewEditMode EditOnEnter;

　　新行指定默认值

　　Specify Default Values for New Rows in the Windows Forms DataGridView ControlSample private void dataGridView _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 = ;e Row Cells[ Region ] Value = NA ;e Row Cells[ Country ] Value = USA ;e Row Cells[ CustomerID ] Value = NewCustomerId();

　　数据验证

　　Validate Data in the Windows Forms DataGridView ControlSamples private void dataGridView _CellValidating(object sender DataGridViewCellValidatingEventArgs e)// Validate the CompanyName entry by disallowing empty strings if (dataGridView Columns[e ColumnIndex] Name == CompanyName )if (e FormattedValue ToString() == String Empty)dataGridView Rows[e RowIndex] ErrorText = Company Name must not be empty ;e Cancel = true;

　　数据提交到dataset中

　　DataSet ds = new DataSet( MyDataSet );ds Tables[biaom Trim()] Rows Clear();tryfor (int i = ; i < dataGridView Rows Count ; i++)DataTable dt = ds Tables[biaom Trim()];DataRow myrow = ds Tables[biaom Trim()] NewRow();for (int j = ; j < dataGridView Columns Count; j++)myrow[j] = Convert ToString(dataGridView Rows[i] Cells[j] Value);ds Tables[biaom Trim()] Rows Add(myrow);catch (Exception)MessageBox Show( 输入类型错误！ );return;

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