【发布时间】：2014-02-08 19:30:26
【问题描述】：
我有两个按钮，一个点击进入药物表格，另一个点击进入处方表格。我想要实现的是，如果我在药物表格中输入了一条记录，处方表格将自动生成一个处方 ID，并根据我在药物表格上输入的药物名称弹出药物名称。
对于处方表单中的字段 drugName，它最初是一个 drugID，但我使用左外连接显示为药物表中存在的 drugName。
对于附加的第一张图片，处方表有 panadol 记录的原因是因为我在处方数据库中输入了数字 3 的药物 ID。我不想在数据库中手动输入它，我希望它在我以药物形式插入记录时自动弹出。看，当我用强效的 panadol 插入记录时，它没有出现在处方表中！！！！！
处方和药物表格
处方表
药物治疗台
键入值并单击药物表单中的提交按钮后出错。 将 nvarchar 值“panadol3”转换为数据类型 int 时转换失败。
//处方格式代码
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Configuration;
namespace GRP_02_03_SACP
{
public partial class prescription : Form
{
// Data Table to store employee data
DataTable Prescription = new DataTable();
// Keeps track of which row in Gridview
// is selected
DataGridViewRow currentRow = null;
SqlDataAdapter PrescriptionAdapter;
public prescription()
{
InitializeComponent();
}
private void prescription_Load(object sender, EventArgs e)
{
LoadPrescriptionRecords();
}
private void LoadPrescriptionRecords()
{
//retrieve connection information info from App.config
string strConnectionString = ConfigurationManager.ConnectionStrings["sacpConnection"].ConnectionString;
//STEP 1: Create connection
SqlConnection myConnect = new SqlConnection(strConnectionString);
//STEP 2: Create command
string strCommandText = "SELECT prescriptionID, med.medicationName FROM PRESCRIPTION AS pres";
strCommandText += " LEFT OUTER JOIN medication as med on pres.medicationid = med.medicationid";
PrescriptionAdapter = new SqlDataAdapter(strCommandText, myConnect);
//command builder generates Select, update, delete and insert SQL
// statements for MedicalCentreAdapter
SqlCommandBuilder cmdBuilder = new SqlCommandBuilder(PrescriptionAdapter);
// Empty Employee Table first
Prescription.Clear();
// Fill Employee Table with data retrieved by data adapter
// using SELECT statement
PrescriptionAdapter.Fill(Prescription);
// if there are records, bind to Grid view & display
if (Prescription.Rows.Count > 0)
grdPrescription.DataSource = Prescription;
}
private void btnPrint_Click(object sender, EventArgs e)
{
if (printDialog1.ShowDialog() == DialogResult.OK) // this displays the dialog box and performs actions dependant on which option chosen.
{
printDocument1.Print();
}
}
private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
int columnPosition = 0;
int rowPosition = 25;
// run function to draw headers
DrawHeader(new Font(this.Font, FontStyle.Bold), e.Graphics, ref columnPosition, ref rowPosition); // runs the DrawHeader function
rowPosition += 35; // sets the distance below the header text and the next black line (ruler)
// run function to draw each row
DrawGridBody(e.Graphics, ref columnPosition, ref rowPosition);
}
// DrawHeader will draw the column title, move over, draw the next column title, move over, and continue.
private int DrawHeader(Font boldFont, Graphics g, ref int columnPosition, ref int rowPosition)
{
foreach (DataGridViewColumn dc in grdPrescription.Columns)
{
//MessageBox.Show("dc = " + dc);
g.DrawString(dc.HeaderText, boldFont, Brushes.Black, (float)columnPosition, (float)rowPosition);
columnPosition += dc.Width + 5; // adds to colPos. value the width value of the column + 5.
}
return columnPosition;
}
/* DrawGridBody will loop though each row and draw it on the screen. It starts by drawing a solid line on the screen,
* then it moves down a row and draws the data from the first grid column, then it moves over, then draws the data from the next column,
* moves over, draws the data from the next column, and continus this pattern. When the entire row is drawn it starts over and draws
* a solid line then the row data, then the next solid line and then row data, etc.
*/
private void DrawGridBody(Graphics g, ref int columnPosition, ref int rowPosition)
{
// loop through each row and draw the data to the graphics surface.
foreach (DataRow dr in ((DataTable)grdPrescription.DataSource).Rows)
{
columnPosition = 0;
// draw a line to separate the rows
g.DrawLine(Pens.Black, new Point(0, rowPosition), new Point(this.Width, rowPosition));
// loop through each column in the row, and draw the individual data item
foreach (DataGridViewColumn dc in grdPrescription.Columns)
{
// draw string in the column
string text = dr[dc.DataPropertyName].ToString();
g.DrawString(text, this.Font, Brushes.Black, (float)columnPosition, (float)rowPosition + 10f); // the last number (10f) sets the space between the black line (ruler) and the text below it.
// go to the next column position
columnPosition += dc.Width + 5;
}
// go to the next row position
rowPosition = rowPosition + 60; // this sets the space between the row text and the black line below it (ruler).
}
}
private void btnPrintPreview_Click(object sender, EventArgs e)
{
try
{
// PrintPreviewDialog printPreviewDialog1 = new PrintPreviewDialog(); // instantiate new print preview dialog
printPreviewDialog1.Document = this.printDocument1;
if (printPreviewDialog1.ShowDialog() == DialogResult.OK) // Show the print preview dialog, uses printPage event to draw preview screen
{
printDocument1.Print();
}
}
catch (Exception exp)
{
System.Console.WriteLine(exp.Message.ToString());
}
}
}
}
药物表格代码。这是我在 insertprescription 触发器中的代码。
ALTER TRIGGER insertPrescriptions ON dbo.MEDICATION AFTER INSERT AS INSERT INTO drug(prescriptionID, drugID) 从插入的 GO 中选择 MedicationID, MedicationName
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Configuration;
namespace GRP_02_03_SACP
{
public partial class medication : Form
{
// Data Table to store employee data
DataTable Medication = new DataTable();
// Keeps track of which row in Gridview
// is selected
DataGridViewRow currentRow = null;
SqlDataAdapter MedicationAdapter;
public medication()
{
InitializeComponent();
}
private void btnSubmit_Click(object sender, EventArgs e)
{
if (btnSubmit.Text == "Clear")
{
btnSubmit.Text = "Submit";
ClearTextBoxes();
txtmedicationType.Focus();
}
else
{
btnSubmit.Text = "Clear";
int result = AddMedicationRecord();
if (result > 0)
MessageBox.Show("Insert Successful");
else
MessageBox.Show("Insert Fail");
}
}
private void ClearTextBoxes()
{
txtmedicationType.Clear();
txtmedicationName.Clear();
txtexpiryDate.Clear();
txtmedicationPrice.Clear();
}
private int AddMedicationRecord()
{
int result = 0;
// TO DO: Codes to insert customer record
//retrieve connection information info from App.config
string strConnectionString = ConfigurationManager.ConnectionStrings["sacpConnection"].ConnectionString;
//STEP 1: Create connection
SqlConnection myConnect = new SqlConnection(strConnectionString);
//STEP 2: Create command
String strCommandText = "INSERT MEDICATION(medicationType, medicationName, expiryDate, medicationPrice) "
+ " VALUES (@NewmedicationType, @NewmedicationName,@NewexpiryDate, @NewmedicationPrice)";
SqlCommand updateCmd = new SqlCommand(strCommandText, myConnect);
updateCmd.Parameters.AddWithValue("@NewmedicationName", txtmedicationName.Text);
//updateCmd.Parameters["@clientid"].Direction = ParameterDirection.Output;
// STEP 3 open connection and retrieve data by calling ExecuteReader
myConnect.Open();
// STEP 4: execute command
// indicates number of record updated.
result = updateCmd.ExecuteNonQuery();
// STEP 5: Close
myConnect.Close();
return result;
}
private void medication_Load(object sender, EventArgs e)
{
LoadMedicationRecords();
}
private void LoadMedicationRecords()
{
//retrieve connection information info from App.config
string strConnectionString = ConfigurationManager.ConnectionStrings["sacpConnection"].ConnectionString;
//STEP 1: Create connection
SqlConnection myConnect = new SqlConnection(strConnectionString);
//STEP 2: Create command
string strCommandText = "SELECT medicationID, medicationType, medicationName, expiryDate, medicationPrice FROM MEDICATION";
MedicationAdapter = new SqlDataAdapter(strCommandText, myConnect);
//command builder generates Select, update, delete and insert SQL
// statements for MedicalCentreAdapter
SqlCommandBuilder cmdBuilder = new SqlCommandBuilder(MedicationAdapter);
// Empty Employee Table first
Medication.Clear();
// Fill Employee Table with data retrieved by data adapter
// using SELECT statement
MedicationAdapter.Fill(Medication);
// if there are records, bind to Grid view & display
if (Medication.Rows.Count > 0)
grdMedication.DataSource = Medication;
}
private void btnUpdate_Click(object sender, EventArgs e)
{
int modifiedRows = 0;
// Get changes
DataTable UpdatedTable = Medication.GetChanges();
if (UpdatedTable != null)
{
// there are changes
// Write modified data to database
modifiedRows = MedicationAdapter.Update(UpdatedTable);
// accept changes
Medication.AcceptChanges();
}
else
MessageBox.Show("there are no changes to update");
if (modifiedRows > 0)
{
MessageBox.Show("There are " + modifiedRows + " records updated");
LoadMedicationRecords();
}
}
private void grdMedication_CellValueChanged(object sender, DataGridViewCellEventArgs e)
{
MedicationAdapter.Update(Medication);
}
}
}
【问题讨论】：
-
用drugform的event valuechanged刷新处方表怎么样！
-
如何创建那个事件值改变了？和要输入的代码？ @FeliceM
-
我不知道你在用什么。但是，假设您使用的是 dagridview，请查找 DataGridView.CellValueChanged，然后在此类事件中编写代码以刷新/更新第二个网格。类似 MedicationAdapter.Update(Medication)
-
所以通过这样做，每次我使用药物表格在药物表中插入一条记录时，它都会在处方表数据库中插入一条记录？ @FeliceM
-
是的，我使用数据网格视图。我想你有错误的想法。我的意思是它甚至没有插入到我的处方表数据库中。我希望每当我使用表格在药物中插入记录时，也会在处方表数据库中输入一条记录，其中只有一个自动递增的处方 ID 和我使用药物表格插入的药物名称。 @FeliceM