“用/main编译以指定包含入口点的类型." [英] "Compile with /main to specify the type that contains the entry point."
问题描述
按照下面的代码，我收到以下消息.我相当确定为什么"得到它，我只是不知道如何重新排列代码来移动/删除/替换引起错误的语句之一.
Per the code below, I am getting the following message. I am fairly certain "why" I am getting it, I just don't know how to rearrange the code to move/remove/replace one of the error causing statements.
使用/main进行编译以指定包含入口点的类型."
我从 "static void Main(string [] args)" 下获得了一堆代码 http://support.microsoft.com/kb/816112 出于从自动增量获取ID的目的，因此当其余代码填充Access数据库时，我可以让它自动递增.任何帮助表示赞赏.也欢迎使用更简单的代码获得结果的建议！
There is a bunch of code in there under "static void Main(string[] args)", that I got from http://support.microsoft.com/kb/816112 forthe purpose of getting the ID from auto-increment, so i can have it auto increment, when the rest of the code populates the Access database. Any help is appreciated. And suggestions to get the results with easier code are welcome, as well!
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();
}
}
}
推荐答案
没有一个答案很明确.
通过右键单击项目可以访问该项目的属性对话框，其中有一个应用程序"选项卡.在此选项卡上，有一个启动对象"的下拉列表-只需选择Visual Studio应该定位的正确的类文件即可.只要该类文件中存在Main static void事件，它将以它为目标.确保Main为大写.这是行不通的:
The properties Dialog of the project, accessed by right-clicking the project, has an Application tab. On this tab there is a drop down list for 'Startup Object' -- just select the correct class file that Visual Studio should target. As long as there is a Main static void event in that class file, it will target it. Be sure Main is capitalized. This won't work:
静态void main(string [] args) { ... 代码 ... }
static void main(string[] args) { ... code ... }
这是一张图片:
在Web项目中，您可以右键单击ASPX文件并将其设置为启动页面，这非常相似.为什么Visual Studio掩埋此设置没有任何意义，但这就是您的操作方式.
In a web project you can right click on an ASPX file and set it as the startup page, very similar thing. Why Visual Studio buries this setting doesn't make sense but this is how you do it.
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