文件名称:
C#DataGridView中的常用技巧
开发工具:
文件大小: 5kb
下载次数: 0
上传时间: 2009-04-07
详细说明： dbfC#DataGridView中的常用技巧 只列出技巧部分,后面会有补充 0(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); 1、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; 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; } ...展开收缩
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