根据下面的代码,我收到以下消息.我很确定“为什么”我得到它,我只是不知道如何重新排列代码来移动/删除/替换其中一个错误导致语句.
“使用/ main编译以指定包含入口点的类型.”
在“static void Main(string [] args)”下面有一堆代码,我是从中得到的
http://support.microsoft.com/kb/816112
为了从自动增量中获取ID,所以当剩下的代码填充Access数据库时,我可以自动增加它.任何帮助表示赞赏.我们也欢迎使用更简单的代码获得结果的建议！
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
OleDbConnection vcon = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;data source=C:\Hazardous Materials\KinneyDatabase.accdb");
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender,EventArgs e)
{
vcon.open();
try
{
StreamReader sr = new StreamReader(@"C:\Hazardous Materials\cities.txt");
string line = sr.ReadLine();
StreamReader sr2 = new StreamReader(@"C:\Hazardous Materials\drugs.txt");
string line2 = sr2.ReadLine();
StreamReader sr3 = new StreamReader(@"C:\Hazardous Materials\strengths.txt");
string line3 = sr3.ReadLine();
while (line != null)
{
comboBox1.Items.Add(line);
line = sr.ReadLine();
}
while (line2 != null)
{
comboBox2.Items.Add(line2);
line2 = sr2.ReadLine();
}
while (line3 != null)
{
comboBox3.Items.Add(line3);
line3 = sr3.ReadLine();
}
textBox2.Text = "Date";
}
catch (System.Exception ex)
{
MessageBox.Show("Error: " + ex.Message);
}
}
private static OleDbCommand cmdGetIdentity;
[STAThread]
static void Main(string[] args)
{
// Open Connection
OleDbConnection vcon = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;data source=C:\Hazardous Materials\KinneyDatabase.accdb");
vcon.open();
// If the test table does not exist then create the Table
string strsql;
strsql = "CREATE TABLE AutoIncrementTest " +
"(ID int identity,Description varchar(40)," +
"CONSTRAINT AutoIncrementTest_PrimaryKey PRIMARY KEY (ID))";
// Command for Creating Table
OleDbCommand cmdJetDB = new OleDbCommand(strsql,vcon);
cmdJetDB.ExecuteNonQuery();
// Create a DataAdaptor With Insert Command For inserting records
OleDbDataAdapter oleDa = new OleDbDataAdapter("Select * from AutoIncrementTest",vcon);
// Command to Insert Records
OleDbCommand cmdInsert = new OleDbCommand();
cmdInsert.CommandText = "INSERT INTO AutoIncrementTest (Description) VALUES (?)";
cmdInsert.Connection = vcon;
cmdInsert.Parameters.Add(new OleDbParameter("Description",OleDbType.VarChar,40,"Description"));
oleDa.InsertCommand = cmdInsert;
// Create a DataTable
DataTable dtTest = new DataTable();
oleDa.Fill(dtTest);
DaTarow drTest;
// Add Rows to the Table
drTest = dtTest.NewRow();
drTest["Description"] = "This is a Test Row 1";
dtTest.Rows.Add(drTest);
drTest = dtTest.NewRow();
drTest["Description"] = "This is a Test Row 2";
dtTest.Rows.Add(drTest);
// Create another Command to get IDENTITY Value
cmdGetIdentity = new OleDbCommand();
cmdGetIdentity.CommandText = "SELECT @@IDENTITY";
cmdGetIdentity.Connection = vcon;
// Delegate for Handling RowUpdated event
oleDa.RowUpdated += new OleDbrowUpdatedEventHandler(HandleRowUpdated);
// Update the Data
oleDa.Update(dtTest);
// Drop the table
cmdJetDB.CommandText = "DROP TABLE AutoIncrementTest";
cmdJetDB.ExecuteNonQuery();
// Release the Resources
cmdGetIdentity = null;
cmdInsert = null;
cmdJetDB = null;
vcon.Close();
vcon = null;
}
// Event Handler for RowUpdated Event
private static void HandleRowUpdated(object sender,OleDbrowUpdatedEventArgs e)
{
if (e.Status == UpdateStatus.Continue && e.StatementType == StatementType.Insert )
{
// Get the Identity column value
e.Row["ID"] = Int32.Parse(cmdGetIdentity.ExecuteScalar().ToString());
System.Diagnostics.Debug.WriteLine(e.Row["ID"]);
e.Row.AcceptChanges();
}
}
private void button1_Click(object sender,EventArgs e)
{
if (comboBox1.Selectedindex <= 0)
{
MessageBox.Show("All fields must be filled out to submit the form");
}
else if (comboBox2.Selectedindex <= 0)
{
MessageBox.Show("All fields must be filled out to submit the form");
}
string addRemove = "";
//string toFrom = "";
if (radioButton1.Checked)
{
addRemove = "add";
//toFrom = "to";
}
else if (radioButton2.Checked)
{
addRemove = "remove";
//toFrom = "from";
}
float mgTotal = (float.Parse(textBox1.Text) * float.Parse(comboBox3.Text));
MessageBox.Show("You have entered the following information: \n\n"
+ "\n" + "Location: " + float.Parse(comboBox1.Text)
+ "\n" + "Medication: " + comboBox2.Text
+ "\n" + "Quantity " + textBox2.Text
+ "\n" + "Strength " + float.Parse(comboBox3.Text)
+ "\n" + "Initials: " + textBox3.Text
+ "\n" + "Add or Remove: " + addRemove
+ "\n" + "Date: " + textBox2.Text);
}
private void button2_Click(object sender,EventArgs e)
{
new Form2().Show();
}
private void button3_Click(object sender,EventArgs e)
{
Application.Exit();
}
private void toolStripMenuItem1_Click(object sender,EventArgs e)
{
MessageBox.Show("Produced for use by HealthDirect© \n Scripted by Geoff Bertollini. march 2012");
}
private void comboBox1_SelectedindexChanged(object sender,EventArgs e)
{
}
private void comboBox2_SelectedindexChanged(object sender,EventArgs e)
{
comboBox3.Selectedindex = comboBox2.Selectedindex;
}
private void textBox2_TextChanged(object sender,EventArgs e)
{
var date = DateTime.Now.ToString("MM/dd/yyyy");
textBox2.Text = date;
}
private void label4_Click_1(object sender,EventArgs e)
{
}
private void exitToolStripMenuItem1_Click(object sender,EventArgs e)
{
Application.Exit();
}
private void button4_Click(object sender,EventArgs e)
{
string addRemove = "";
string toFrom = "";
if (radioButton1.Checked)
{
addRemove = "added";
toFrom = "to";
}
else if (radioButton2.Checked)
{
addRemove = "removed";
toFrom = "from";
}
float mgTotal = (float.Parse(textBox1.Text) * float.Parse(comboBox3.Text));
string vsql = string.Format("insert into Log values " +
"('{0}','{1}',{2},{3},'{4}',#{5}#,'{6}','{7}')",comboBox1.Text,comboBox2.Text,float.Parse(textBox1.Text),float.Parse(comboBox3.Text),textBox3.Text,textBox2.Text,addRemove,"1"
);
OleDbCommand vcom = new OleDbCommand(vsql,vcon);
vcom.ExecuteNonQuery();
MessageBox.Show("Date: " + textBox2.Text + "\n Initials: " + textBox3.Text
+ "\n" + "You have " + addRemove + " " + mgTotal + " milligrams " + "\n"
+ "of " + comboBox2.Text + "\n" + toFrom + " the inventory of \n" + comboBox1.Text);
vcom.dispose();
}
}
}
解决方法
原文地址：https://www.jb51.cc/csharp/98227.html
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