本人资金极少，愿知道的朋友帮帮忙，我将不尽感激！
OpenFileDialog OpenFile = new OpenFileDialog();
OpenFile.Title = "请选择数据库文件";
OpenFile.Filter = "Access数据库文件(*.mdb)|*.mdb";
OpenFile.ShowDialog();
// if(OpenFile .)
//定义字符串变量，保存用户选择
string databaseName = String.Empty;
databaseName = OpenFile.FileName;
if (databaseName == string.Empty)
return;
//判断是否输入密码
//if (textBox1.Text == string.Empty)
//return;
//定义连接数据库的对象
string strCon;
if (checkBox1.CheckState == CheckState.Checked)
{
if (textBox1.Text == string.Empty)
return;
strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Jet OLEDB:DataBase Password="
+ textBox1.Text + ";User Id=admin;Data source="
+ databaseName;//数据库有密码
}
else
strCon = "Provider=Microsoft.Jet.OLEDB.4.0;"
+ ";User Id=admin;Data source="
+ databaseName; ;//数据库无密码
OleDbConnection conn = new OleDbConnection(strCon );
conn.Open();
//判断连接状态
if (conn.State == ConnectionState.Open)
{
MessageBox.Show("数据库连接成功", "信息提示");//
OleDbCommand cmd = new OleDbCommand();
cmd.Connection = conn;
string str = string.Format("select * from {0}",databaseName);//错误在此，但是想了很多办法都无济于事！！
cmd.CommandText = str;
cmd.CommandType = CommandType.Text;
//int i=Convert.ToInt32 (cmd.ExecuteScalar());
//MessageBox.Show("数据库中的记录总数为：" + i.ToString(), "信息提示");
OleDbDataAdapter sda = new OleDbDataAdapter();
sda.SelectCommand = cmd;
//定义数据集对象
DataSet ds = new DataSet();
sda.Fill(ds, "sioerj");//
dataGridView1.DataSource = ds.Tables[0];
}
else
MessageBox.Show("数据库连接不成功", "信息提示");
string str = string.Format("select * from [{0}]",databaseName);
我曾经也尝试过仍然不行
|
