推薦：解讀.Net基礎：學習反射中的動態(tài)創(chuàng)建對象
Assembly的CreateInstance有三個重載，第一個參數(shù)需要是一個字符串表示的完整的類名。第二個參數(shù)是一個bool類型，如果為true，表示對第一個參數(shù)不區(qū)分大小寫。 第三個： 影響執(zhí)行搜索的方式的位屏蔽。此值是 System.Reflection.BindingFlags 中的位標志的組

0(最基本的技巧)、獲取某列中的某行(某單元格)中的內(nèi)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、自定義列

//定義列寬

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 TheirBehavior and

AppearanceHost Controls in Windows Forms DataGridView Cells

繼承 DataGridViewTextBoxCell 類生成新的Cell類，然后再繼承 DataGridViewColumn 生成新的Column類，并指定

CellTemplate為新的Cell類。新生成的Column便可以增加到DataGridView中去。

2、自動適應列寬

Programmatically Resize Cells to Fit Content in

the Windows Forms DataGridView ControlSamples：

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、可以綁定并顯示對象

Bind Objects to Windows Forms DataGridView Controls

4、可以改變表格線條風格

 

Change the Border and Gridline Styles in

the Windows Forms DataGridView ControlSamples:

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、動態(tài)改變列是否顯示，和動態(tài)改變列的顯示順序

Change the Order of the Columns in the Windows Forms DataGridView ControlSamples：

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、可以在列中顯示圖像

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";

dataGridView1.Columns.Insert(2, iconColumn);

7、格式化顯示內(nèi)容:

Format Data in the Windows Forms DataGridView ControlSamples:

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、在拖動列的滾動條時可以將指定的列凍結(jié)

Freeze Columns in the Windows Forms DataGridView ControlSamples：

將指定列及以前的列固定不動this.dataGridView1.Columns["AddToCartButton"].

Frozen = true;

9、獲取選擇的單元格,行,列

Get the Selected Cells, Rows,

and Columns in the Windows Forms DataGridView ControlSamples:

10、顯示錄入時出現(xiàn)的錯誤信息

Handle Errors that Occur During Data Entry in the Windows

Forms DataGridView ControlSamples：

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、大數(shù)據(jù)量顯示采用Virtual Mode

Implement Virtual Mode in the Windows Forms DataGridView Control

12、設置指定的列只讀

Make Columns in the Windows Forms DataGridView Control Read-OnlySamples：

dataGridView1.Columns["CompanyName"].ReadOnly = true;

13、移去自動生成的列

Remove Autogenerated Columns from a Windows Forms DataGridView ControlSample:

dataGridView1.AutoGenerateColumns

= true;dataGridView1.DataSource

= customerDataSet;dataGridView1.Columns.Remove ("Fax");

或：dataGridView1.Columns["CustomerID"].Visible = false;

14、自定義

選擇模式

Set the Selection Mode of the Windows Forms DataGridView ControlSample：

this.dataGridView1.SelectionMode

= DataGridViewSelectionMode.FullRowSelect;

this.dataGridView1.MultiSelect = false;

15、自定義設定光標進入單元格是否編輯模式（編輯模式）

Specify the Edit Mode for the Windows Forms DataGridView

Controlthis.dataGridView1.EditMode

= DataGridViewEditMode.EditOnEnter;

16、新行指定默認值

Specify Default Values for New Rows in the Windows

Forms DataGridView ControlSample：

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、數(shù)據(jù)驗證

Validate Data in the Windows Forms DataGridView ControlSamples：

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、數(shù)據(jù)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("輸入類型錯誤！");

return;

}

分享：談如何使用 Lambda 表達式做抽象代表
Lambda表達比代表定義和帶外方法定義的結(jié)合更清楚，且相關(guān)的額外工作只需要滿足語言定義即可。不過，它也有一些不足之處。如果某個方法的參數(shù)包含System.Delegate 這樣的抽象類型，用lambda表達式介紹特殊的問題：C#編譯器不能將lambda表達式轉(zhuǎn)換成還未明確