菜鸟问题:连接数据库时出错,请指教!

lianhoo 2006-03-16 02:02:06
private void button1_Click(object sender, System.EventArgs e)
{
string _strConn = @"Data Source=GTA-DBSERVER\ZLK;Initial Catalog=pubs;User Id=sa;Password=123;";
SqlConnection _conn = new SqlConnection(_strConn);
string _sql = "select * from titles";
SqlDataAdapter _adp = new SqlDataAdapter( _sql, _conn);
DataTable _dt = new DataTable();
_adp.Fill(_dt);
_dv = _dt.DefaultView;
this.dataGrid1.DataSource =_dv;
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lianhoo 2006-03-16
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谢谢大家!搞定了!更感谢楼上的.结贴!
itmingong 2006-03-16
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你要填充数据集里面的表!
SqlDataAdapter _adp = new SqlDataAdapter( _sql, _conn);
DataTable _dt = new DataTable();
DataSet ds=new DataSet();
ds.Tables.Add(_dt);
_adp.Fill(ds,_dt.TableName);
DataView _dv = _dt.DefaultView;
this.dataGrid1.DataSource =_dv;
lianhoo 2006-03-16
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无法将类型“System.Data.DataRowView”隐式转换为“System.Data.DataView”

好像快要成功了
GoToTheFinaL 2006-03-16
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just try it

change the original code

"DataView _dv = _dt.DefaultView"

as

"DataView _dv = _dt.DefaultView[0];"
lianhoo 2006-03-16
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去掉的话再加个\吧?
this.dataGrid1.DataSource =ds.Table["aa"];
提示没有Table啊.
yz1199 2006-03-16
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string _strConn = @"Data Source=GTA-DBSERVER\ZLK;Initial Catalog=pubs;User Id=sa;Password=;";去掉@
yz1199 2006-03-16
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SqlDataAdapter _adp = new SqlDataAdapter( _sql, _conn);
DataSet ds = new DataSet();
_adp.Fill(ds,"aa");

this.dataGrid1.DataSource =ds.Table["aa"];
lianhoo 2006-03-16
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using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;

namespace Connect_SQL
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button1;
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.DataGrid dataGrid1;
// private SqlConnection myConnection;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;

public Form1()
{
//
// 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.button1 = new System.Windows.Forms.Button();
this.textBox1 = new System.Windows.Forms.TextBox();
this.dataGrid1 = new System.Windows.Forms.DataGrid();
((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).BeginInit();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(72, 240);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(96, 32);
this.button1.TabIndex = 0;
this.button1.Text = "显示";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(312, 8);
this.textBox1.Multiline = true;
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(128, 216);
this.textBox1.TabIndex = 2;
this.textBox1.Text = "";
//
/* // dataGrid1
//
this.dataGrid1.Anchor = System.Windows.Forms.AnchorStyles.Left;
this.dataGrid1.DataMember = "";
this.dataGrid1.HeaderForeColor = System.Drawing.SystemColors.ControlText;
this.dataGrid1.Location = new System.Drawing.Point(0, 0);
this.dataGrid1.Name = "dataGrid1";
this.dataGrid1.Size = new System.Drawing.Size(292, 216);
this.dataGrid1.TabIndex = 1;
this.dataGrid1.Navigate += new System.Windows.Forms.NavigateEventHandler(this.dataGrid1_Navigate);
*/ //
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(448, 273);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.dataGrid1);
this.Controls.Add(this.button1);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).EndInit();
this.ResumeLayout(false);

}
#endregion

/// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}

private void button1_Click(object sender, System.EventArgs e)
{
string _strConn = @"Data Source=GTA-DBSERVER\ZLK;Initial Catalog=pubs;User Id=sa;Password=;";
SqlConnection _conn = new SqlConnection(_strConn);
string _sql = "select * from titles";
SqlDataAdapter _adp = new SqlDataAdapter( _sql, _conn);
DataTable _dt = new DataTable();
_adp.Fill(_dt);
DataView _dv = _dt.DefaultView;
this.dataGrid1.DataSource =_dv;
zlz_212 2006-03-16
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把错误代码贴出来吧!
lianhoo 2006-03-16
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好像是那个_dv出错了,不知怎么声明.大家帮个忙吧

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