一分钟即刻送分！DataGrid中如何指定关联表数据源！！！

Question

如果你的typeID是整整下面就是用int,如果是字符或其它類型就用其它，0表示ds中的第一列，如果第二列就依次增加1
dataGrid1.DataSource=ds.Tables["DataTable _a"];
int typeid = Convert.ToInt32(dataGrid1[dataGrid1.CurrentRowIndex,0].ToString());
DataView dv = ds.Tables["DataTable _b"].DefaultView
dv.RowFilter = "TypeID = "+typeid.ToString();
dataGrid2.DataSource = dv;

Answer 1

///这里给出一个相似的例子。
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.OleDb;namespace useDataGrid
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
        private System.Windows.Forms.DataGrid dataGrid1;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null; public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent(); //
// TODO: Add any constructor code after InitializeComponent call
//
} /// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null) 
{
components.Dispose();
}
}
base.Dispose( disposing );
} #region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
            this.dataGrid1 = new System.Windows.Forms.DataGrid();
            ((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).BeginInit();
            this.SuspendLayout();
            // 
            // dataGrid1
            // 
            this.dataGrid1.Anchor = (((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
                | System.Windows.Forms.AnchorStyles.Left) 
                | System.Windows.Forms.AnchorStyles.Right);
            this.dataGrid1.DataMember = "";
            this.dataGrid1.Name = "dataGrid1";
            this.dataGrid1.Size = new System.Drawing.Size(312, 264);
            this.dataGrid1.TabIndex = 0;
            // 
            // Form1
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClientSize = new System.Drawing.Size(312, 269);
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.dataGrid1});
            this.Name = "Form1";
            this.Text = "使用DataGrid控件来显示数据";
            this.Load += new System.EventHandler(this.Form1_Load);
            ((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).EndInit();
            this.ResumeLayout(false);        }
#endregion /// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main() 
{
Application.Run(new Form1());
}        private void Form1_Load(object sender, System.EventArgs e)
        {
            string connString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=mctest.mdb";             // 实例化OleDbConnection对象
            OleDbConnection myConnection = new OleDbConnection(); 
            myConnection.ConnectionString = connString;            // 实例化OleDbDataAdapter对象
            OleDbDataAdapter da = new OleDbDataAdapter("SELECT * FROM Developer", myConnection); 
            
            // 实例化DataSet对象
            DataSet ds = new DataSet(); 
            
            // 把表中的数据填到DataSet对象中
            da.Fill(ds, "Developer");
            
            // 把数据显示在DataGrid控件中
            dataGrid1.DataSource = ds.DefaultViewManager; 
        }
}
}