小弟问一个关于dataGrid1 的问题 大家帮帮忙吧 困扰小弟好几天了....
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.OleDb;
namespace WindowsApplication1
{
/// <summary>
/// Form5 的摘要说明。
/// </summary>
public class Form5 : System.Windows.Forms.Form
{
private System.Windows.Forms.Label label1;
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
private DataSet ds=new DataSet();
private string Afile;
private OleDbConnection Conn;
//private System.Windows.Forms.Button updata_button;
//private System.Windows.Forms.Button del_botton;
private string sss= " ";
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
public Form5()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent();
//
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if(components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.label1 = new System.Windows.Forms.Label();
this.textBox1 = new System.Windows.Forms.TextBox();
this.button1 = new System.Windows.Forms.Button();
this.button2 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// label1
//
this.label1.Font = new System.Drawing.Font( "宋体 ", 15F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
this.label1.Location = new System.Drawing.Point(40, 48);
this.label1.Name = "label1 ";
this.label1.Size = new System.Drawing.Size(376, 40);
this.label1.TabIndex = 0;
this.label1.Text = "请输入您要查询的学生选课情况的学号 ";
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(152, 112);
this.textBox1.Name = "textBox1 ";
this.textBox1.Size = new System.Drawing.Size(184, 21);
this.textBox1.TabIndex = 1;
this.textBox1.Text = " ";
this.textBox1.TextChanged += new System.EventHandler(this.textBox1_TextChanged);
//
// button1
//
this.button1.Font = new System.Drawing.Font( "宋体 ", 15.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
this.button1.Location = new System.Drawing.Point(224, 256);
this.button1.Name = "button1 ";
this.button1.Size = new System.Drawing.Size(88, 40);
this.button1.TabIndex = 2;
this.button1.Text = "确定 ";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// button2
//
this.button2.Font = new System.Drawing.Font( "宋体 ", 15F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
this.button2.Location = new System.Drawing.Point(360, 256);
this.button2.Name = "button2 ";
this.button2.Size = new System.Drawing.Size(80, 40);
this.button2.TabIndex = 3;
this.button2.Text = "取消 ";
this.button2.Click += new System.EventHandler(this.button2_Click);
//
// Form5
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(560, 414);
this.Controls.Add(this.button2);
this.Controls.Add(this.button1);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.label1);
this.Name = "Form5 ";
this.Text = "Form5 ";
this.ResumeLayout(false);
}
#endregion
private void look()
{
Afile= "provider=Microsoft.Jet.OLEDB.4.0;Data Source=pass_word.mdb ";
Conn=new OleDbConnection(Afile);
string sqlcmd= "select student from [student1] where num= ' "+textBox1.Text+ " ' ";
OleDbCommand cmd=new OleDbCommand(sqlcmd,Conn);
Conn.Open();
try
{
cmd.ExecuteNonQuery();
}
catch(Exception a)
{
MessageBox.Show(a.ToString());
}
OleDbDataAdapter dsa=new OleDbDataAdapter(sqlcmd,Conn);
ds.Clear();
dsa.Fill(ds, "student ");
Conn.Close();
if(ds.Tables[0].Rows.Count==0)//判断查询结果是否为空
{
MessageBox.Show( "对不起，没有您要查询的信息 ", "错误！！！ ");
}
dataGrid1.DataSource=ds.Tables[ "student "].DefaultView;
dataGrid1.SetDataBinding(ds, "student ");
}
private void button1_Click(object sender, System.EventArgs e)
{
if(textBox1.Text== " ")
{
MessageBox.Show( "请输入查询信息 ", "错误!!! ");
}
else
{
look();
textBox1.Clear();
}
}
private void textBox1_TextChanged(object sender, System.EventArgs e)
{
}
private void button2_Click(object sender, System.EventArgs e)
{
this.Close();
}
}
}
上面的为源代码，在编译的时候出现错误，提示为：
C:\Documents and Settings\victor\桌面\选课\WindowsApplication1\Form5.cs(153): 找不到类型或命名空间名称“dataGrid1”(是否缺少 using 指令或程序集引用？)
C:\Documents and Settings\victor\桌面\选课\WindowsApplication1\Form5.cs(154): 找不到类型或命名空间名称“dataGrid1”(是否缺少 using 指令或程序集引用？
也就是 dataGrid1.DataSource=ds.Tables[ "student "].DefaultView;
dataGrid1.SetDataBinding(ds, "student ");
这两句有错误！
小弟在此先谢谢各位大哥了。。。
[解决办法]
你的dataGrid1在哪里定义了？？
没定义你就用
[解决办法]
private System.Windows.Forms.Label label1;
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Button button2;
---------------------------------------------------
確實沒有定義？？？？丟了？？？
