我这样和DataGrid连接为什么通不过

Question

private string constring="";   定义一个字符串private void button8_Click(object sender, System.EventArgs e)
{
SqlConnection oCon;
String strcon;

oCon=new SqlConnection();
strcon="Data Source=(local);";
strcon+="Initial catalog=Northwind;";
strcon+="user ID=sa;";
strcon+="password=;";
oCon.ConnectionString=strcon;
oCon.Open();   string sql="select * from Customers"; 
  constring=System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"];
  SqlDataAdapter    sda =new SqlDataAdapter(sql,constring);
  DataSet ds=new DataSet();
  sda.Fill(ds);    this.dataGrid1.DataSource=ds;
   this.DataGrid1.DataBind();//该句编译通不过问题何在
       //提示的信息E:\c#\add\Form1.cs(501): “add.Form1”并不包含对“DataGrid1”的定义 oCon.Close();

}
应该如何修改

Answer 1

this.dataGrid1.DataBind();
就 是这句通不过啊

Answer 2

private void button8_Click(object sender, System.EventArgs e)
{
SqlConnection oCon;
String strcon;

oCon=new SqlConnection();
strcon="Data Source=(local);";
strcon+="Initial catalog=Northwind;";
strcon+="user ID=sa;";
strcon+="password=;";
oCon.ConnectionString=strcon;
  string sql="select * from Customers"; 
                    SqlDataAdapter    sda =new SqlDataAdapter(sql,oCon);
  DataSet ds=new DataSet();
  sda.Fill(ds);
   this.dataGrid1.DataSource=ds;
   this.dataGrid1.DataBind();
}

Answer 3

this.dataGrid1.DataSource=ds;
   this.DataGrid1.DataBind();//该句编译通不过问题何在
       //提示的信息E:\c#\add\Form1.cs(501): “add.Form1”并不包含对“DataGrid1”的定义------------------------------------------------
請注意大小寫問題

Answer 4

private void button8_Click(object sender, System.EventArgs e)
{
SqlConnection oCon;
String strcon;

oCon=new SqlConnection();
        constring=System.Configuration.ConfigurationSettings.AppSettings["ConnectionString"];
                             oCon.ConnectionString=constring
  string sql="select * from Customers"; 
                    SqlDataAdapter    sda =new SqlDataAdapter(sql,oCon);
  DataSet ds=new DataSet();
  sda.Fill(ds);
   this.dataGrid1.DataSource=ds;
   this.dataGrid1.DataBind();
}