实例介绍
【实例简介】通用数据库连接，常用的数据库连接功能已实现，已测试通过
【实例截图】
【核心代码】
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
public static string strCon = "";
private void Form1_Load(object sender, EventArgs e)
{
textBox6.Text = "(local)";
}
private void button1_Click(object sender, EventArgs e)
{
openFileDialog1.Filter = "*.mdb(Access数据库文件)|*.mdb|*.xls(Excel文件)|*.xls|*.*(所有文件)|*.*";
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
textBox1.Text = openFileDialog1.FileName;
}
}
private void button2_Click(object sender, EventArgs e)
{
Form2 frm = new Form2();
frm.ShowDialog();
textBox6.Text = Form2.strServer;
}
private void button3_Click(object sender, EventArgs e)
{
if (radioButton1.Checked == true)
{
if (textBox1.Text != "")
{
FileInfo FInfo = new FileInfo(textBox1.Text);
string strExtention = FInfo.Extension;
if (strExtention.ToLower() == ".mdb")
{
if (textBox2.Text != "")
{
strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" textBox1.Text ";UID=" textBox2.Text ";PWD=" textBox3.Text ";";
}
else
{
strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" textBox1.Text ";";
}
}
else if (strExtention.ToLower() == ".xls")
{
strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" textBox1.Text ";Extended Properties=Excel 8.0;";
}
}
OleDbConnection oledbcon = new OleDbConnection(strCon);
try
{
oledbcon.Open();
richTextBox1.Clear();
richTextBox1.Text = strCon "\n连接成功……";
}
catch
{
richTextBox1.Text = "连接失败";
}
}
else if (radioButton2.Checked == true)
{
if (checkBox1.Checked == true)
{
strCon = "Data Source=" textBox6.Text ";Initial Catalog =" comboBox1.Text ";Integrated Security=SSPI;";
}
else if (checkBox2.Checked == true)
{
strCon = "Data Source=" textBox6.Text ";Database=" comboBox1.Text ";Uid=" textBox5.Text ";Pwd=" textBox4.Text ";";
}
SqlConnection sqlcon = new SqlConnection(strCon);
try
{
sqlcon.Open();
richTextBox1.Clear();
richTextBox1.Text = strCon "\n连接成功……";
}
catch
{
richTextBox1.Text = "连接失败";
}
}
}
private void radioButton1_CheckedChanged(object sender, EventArgs e)
{
if (radioButton1.Checked)
{
textBox1.Enabled = textBox2.Enabled = textBox3.Enabled=button1.Enabled = true;
radioButton2.Checked = false;
textBox4.Enabled = textBox5.Enabled = textBox6.Enabled = button2.Enabled
= checkBox1.Enabled = checkBox2.Enabled = comboBox1.Enabled = false;
}
}
private void radioButton2_CheckedChanged(object sender, EventArgs e)
{
if (radioButton2.Checked)
{
radioButton1.Checked = false;
textBox1.Enabled = textBox2.Enabled = textBox3.Enabled = button1.Enabled = textBox4.Enabled = textBox5.Enabled = false;
textBox6.Enabled = button2.Enabled = checkBox1.Enabled = checkBox2.Enabled = comboBox1.Enabled = true;
}
}
private void checkBox1_CheckedChanged(object sender, EventArgs e)
{
if (checkBox1.Checked)
{
checkBox2.Checked = false;
textBox4.Enabled = textBox5.Enabled = false;
string str = "server=" textBox6.Text ";database=master;Integrated Security=SSPI;";
comboBox1.DataSource = getTable(str);
comboBox1.DisplayMember = "name";
comboBox1.ValueMember = "name";
}
}
private void checkBox2_CheckedChanged(object sender, EventArgs e)
{
checkBox1.Checked = false;
textBox4.Enabled = textBox5.Enabled = true;
textBox5.Focus();
}
private DataTable getTable(string str)
{
try
{
SqlConnection sqlcon = new SqlConnection(str);
SqlDataAdapter da = new SqlDataAdapter("select name from sysdatabases ", sqlcon);
DataTable dt = new DataTable("sysdatabases");
da.Fill(dt);
return dt;
}
catch
{
return null;
}
}
private void textBox5_KeyPress(object sender, KeyPressEventArgs e)
{
if (e.KeyChar == 13)
textBox4.Focus();
}
private void textBox4_KeyPress(object sender, KeyPressEventArgs e)
{
if (e.KeyChar == 13)
{
button4_Click(sender, e);
}
}
private void button4_Click(object sender, EventArgs e)
{
string str = "server=" textBox6.Text ";database=master;Uid=" textBox5.Text ";Pwd=" textBox4.Text ";";
comboBox1.DataSource = getTable(str);
comboBox1.DisplayMember = "name";
comboBox1.ValueMember = "name";
}
}
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