代码
private void button1_Click(object sender, EventArgs e) { bindingNavigator1.BindingSource = bindingSource1; LoadData(); } private void LoadData() { // The xml to bind to. string xml = @"<US><states>" + @"<state><name>Washington</name><capital>Olympia</capital></state>" + @"<state><name>Oregon</name><capital>Salem</capital></state>" + @"<state><name>California</name><capital>Sacramento</capital></state>" + @"<state><name>Nevada</name><capital>Carson City</capital></state>" + @"</states></US>"; // Convert the xml string to bytes and load into a memory stream. byte[] xmlBytes = Encoding.UTF8.GetBytes(xml); MemoryStream stream = new MemoryStream(xmlBytes, false); // Create a DataSet and load the xml into it. DataSet set = new DataSet(); set.ReadXml(stream); // Set the DataSource to the DataSet, and the DataMember // to state. bindingSource1.DataSource = set; bindingSource1.DataMember = "state"; textBox1.DataBindings.Add("Text", bindingSource1, "name"); textBox2.DataBindings.Add("Text", bindingSource1, "capital"); }//------------------------------------------------------//DataGridView BindingSource绑定更新示例.txt.cs//根据selectCommand生成增、删、改 命令 SqlCommandBuilderusing System;using System.Data;using System.Data.SqlClient;using System.Windows.Forms;public class Form1 : System.Windows.Forms.Form{ private DataGridView dataGridView1 = new DataGridView(); private BindingSource bindingSource1 = new BindingSource(); private SqlDataAdapter dataAdapter = new SqlDataAdapter(); private Button reloadButton = new Button(); private Button submitButton = new Button(); [STAThreadAttribute()] public static void Main() { Application.Run(new Form1()); } // Initialize the form. public Form1() { dataGridView1.Dock = DockStyle.Fill; reloadButton.Text = "reload"; submitButton.Text = "submit"; reloadButton.Click += new System.EventHandler(reloadButton_Click); submitButton.Click += new System.EventHandler(submitButton_Click); FlowLayoutPanel panel = new FlowLayoutPanel(); panel.Dock = DockStyle.Top; panel.AutoSize = true; panel.Controls.AddRange(new Control[] { reloadButton, submitButton }); this.Controls.AddRange(new Control[] { dataGridView1, panel }); this.Load += new System.EventHandler(Form1_Load); this.Text = "DataGridView databinding and updating demo"; //处理数据异常事件 this.dataGridView1.DataError += new DataGridViewDataErrorEventHandler(dataGridView1_DataError); } void dataGridView1_DataError(object sender, DataGridViewDataErrorEventArgs e) { MessageBox.Show(e.Exception.Message); e.Cancel = true; } private void Form1_Load(object sender, System.EventArgs e) { // Bind the DataGridView to the BindingSource // and load the data from the database. dataGridView1.DataSource = bindingSource1; GetData("select * from tuser"); } private void reloadButton_Click(object sender, System.EventArgs e) { // Reload the data from the database. GetData(dataAdapter.SelectCommand.CommandText); } private void submitButton_Click(object sender, System.EventArgs e) { // Update the database with the user's changes. dataAdapter.Update((DataTable)bindingSource1.DataSource); } private void GetData(string selectCommand) { try { // Specify a connection string. Replace the given value with a // valid connection string for a Northwind SQL Server sample // database accessible to your system. String connectionString = "Integrated Security=SSPI;Persist Security Info=False;" + @"Initial Catalog=Migrate;Data Source=.\SQLSERVER2005"; // Create a new data adapter based on the specified query. dataAdapter = new SqlDataAdapter(selectCommand, connectionString); // Create a command builder to generate SQL update, insert, and // delete commands based on selectCommand. These are used to // update the database. //根据selectCommand生成增、删、改 命令 SqlCommandBuilder commandBuilder = new SqlCommandBuilder(dataAdapter); // Populate a new data table and bind it to the BindingSource. DataTable table = new DataTable(); table.Locale = System.Globalization.CultureInfo.InvariantCulture; dataAdapter.Fill(table); bindingSource1.DataSource = table; // Resize the DataGridView columns to fit the newly loaded content. dataGridView1.AutoResizeColumns( DataGridViewAutoSizeColumnsMode.AllCellsExceptHeader); //隐藏ID列 this.dataGridView1.Columns[0].Visible = false; } catch (SqlException) { MessageBox.Show("To run this example, replace the value of the " + "connectionString variable with a connection string that is " + "valid for your system."); } }}//------------------------------------------------------------------//dataGridView1_CellFormatting// if (Int32.TryParse((String)e.Value, out intValue) &&// (intValue < 0))//经典转换using System;using System.Drawing;using System.Windows.Forms;namespace ns2{ public class Form1 : Form { private DataGridView dataGridView1 = new DataGridView(); private Bitmap highPriImage; private Bitmap mediumPriImage; private Bitmap lowPriImage; public Form1() { // Initialize the images. try { highPriImage = new Bitmap("red.bmp"); mediumPriImage = new Bitmap("green.bmp"); lowPriImage = new Bitmap("brown.bmp"); } catch (ArgumentException) { MessageBox.Show("The Priority column requires Bitmap images " + "named highPri.bmp, mediumPri.bmp, and lowPri.bmp " + "residing in the same directory as the executable file."); } // Initialize the DataGridView. dataGridView1.Dock = DockStyle.Fill; dataGridView1.AllowUserToAddRows = false; dataGridView1.Columns.AddRange( new DataGridViewTextBoxColumn(), new DataGridViewImageColumn()); dataGridView1.Columns[0].Name = "Balance"; dataGridView1.Columns[1].Name = "Priority"; dataGridView1.Rows.Add("-100", "high"); dataGridView1.Rows.Add("0", "medium"); dataGridView1.Rows.Add("100", "low"); dataGridView1.CellFormatting += new System.Windows.Forms.DataGridViewCellFormattingEventHandler( this.dataGridView1_CellFormatting); this.Controls.Add(dataGridView1); } // Changes how cells are displayed depending on their columns and values. private void dataGridView1_CellFormatting(object sender, System.Windows.Forms.DataGridViewCellFormattingEventArgs e) { // Set the background to red for negative values in the Balance column. if (dataGridView1.Columns[e.ColumnIndex].Name.Equals("Balance")) { Int32 intValue; if (Int32.TryParse((String)e.Value, out intValue) && (intValue < 0)) { e.CellStyle.BackColor = Color.Red; e.CellStyle.SelectionBackColor = Color.DarkRed; } } // Replace string values in the Priority column with images. if (dataGridView1.Columns[e.ColumnIndex].Name.Equals("Priority")) { // Ensure that the value is a string. String stringValue = e.Value as string; if (stringValue == null) return; // Set the cell ToolTip to the text value. DataGridViewCell cell = dataGridView1[e.ColumnIndex, e.RowIndex]; cell.ToolTipText = stringValue; // Replace the string value with the image value. switch (stringValue) { case "high": e.Value = highPriImage; break; case "medium": e.Value = mediumPriImage; break; case "low": e.Value = lowPriImage; break; } } } public static void Main() { Application.Run(new Form1()); } }}
来源：https://www.cnblogs.com/wucg/archive/2010/06/16/1758863.html