我来自 vb6 背景,我正在慢慢测试 c# 水域。我的问题是我很难在我的程序中采用面向对象的方法,因为我倾向于按照我在 vb6 中编码的方式来设计我的程序。以我正在创建的软件的这个数据输入部分为例,正如你所看到的,我仍然按照我在 vb6 中编码的方式对其进行编码。
namespace WLMS
{
public partial class frmBA : Form
{
enum status
{
add,
edit,
delete,
complete,
datafill,
}
status stat;
clsSqlCommands sqlCommands = new clsSqlCommands();
string connectionString = ConfigurationManager.ConnectionStrings["Main"].ConnectionString;
int dataID = 0;
public frmBA()
{
InitializeComponent();
}
private void displayInGrid()
{
DataTable dt = new DataTable();
dt = sqlCommands.dataFill("select series,baName,baLoc from tblBA order by baName",connectionString);
if (dt != null)
{
dgBA_List.DataSource = dt;
dgBA_List.Columns[0].HeaderText = null;
dgBA_List.Columns[1].HeaderText = "BA NAME";
dgBA_List.Columns[2].HeaderText = "BA LOCATION";
dgBA_List.Columns[0].Visible = false;
dgBA_List.Columns[1].Width = 100;
dgBA_List.Columns[2].Width = 200;
dataID = 0;
}
}
private void frmBA_Load(object sender, EventArgs e)
{
displayInGrid();
}
private void tlADD_Click(object sender, EventArgs e)
{
groupBox1.Enabled = true;
clearTextBoxes(groupBox1);
txtBAName.Focus();
stat = status.add;
}
private void tlEDIT_Click(object sender, EventArgs e)
{
if (dataID != 0)
{
groupBox1.Enabled = true;
stat = status.edit;
}
else
MessageBox.Show("click on item to edit");
}
private void tlDELETE_Click(object sender, EventArgs e)
{
deleteData();
}
private void tlSAVE_Click(object sender, EventArgs e)
{
if (checkFilledTextBoxes(groupBox1) == true)
{
switch (stat)
{
case status.add:
{
addNewData();
break;
}
case status.edit:
{
editData();
break;
}
default:
{
break;
}
}
}
}
private bool checkForDuplicates()
{
DataRow dtr = sqlCommands.getOneRow("select count(*) as cnt from tblba where baName = '" + txtBAName.Text + "' and baLoc = '" + txtBALoc.Text + "'", connectionString);
if (Convert.ToInt16(dtr["cnt"]) < 1)
{
return false;
}
else
return true;
}
private void editData()
{
if (!checkForDuplicates())
{
sqlCommands.dataManipulate("update tblBa set baName = '" + txtBAName.Text + "',baLoc = '" + txtBALoc.Text + "' where series = " + dataID + "", connectionString);
clearTextBoxes(groupBox1);
groupBox1.Enabled = false;
stat = status.complete;
displayInGrid();
MessageBox.Show("Record Edited");
}
else
MessageBox.Show("Duplicate record");
}
private void deleteData()
{
DialogResult dialogResult = MessageBox.Show("Are you sure?", "", MessageBoxButtons.YesNo);
if (dialogResult == DialogResult.Yes)
{
sqlCommands.dataManipulate("delete from tblBa where series = " + dataID + "", connectionString);
clearTextBoxes(groupBox1);
groupBox1.Enabled = false;
stat = status.complete;
displayInGrid();
MessageBox.Show("Record deleted");
}
else
MessageBox.Show("Duplicate record");
}
private void addNewData()
{
if (!checkForDuplicates())
{
sqlCommands.dataManipulate("insert into tblBa (baName,baLoc) values ('" + txtBAName.Text + "','" + txtBALoc.Text + "')", connectionString);
clearTextBoxes(groupBox1);
txtBAName.Focus();
stat = status.complete;
displayInGrid();
MessageBox.Show("Record Added");
}
else
MessageBox.Show("Duplicate record");
}
private void clearTextBoxes(GroupBox gprx)
{
foreach (TextBox txtBx in gprx.Controls.OfType<TextBox>())
{
txtBx.Text = "";
}
}
private Boolean checkFilledTextBoxes(GroupBox gprx)
{
foreach (TextBox txtBx in gprx.Controls.OfType<TextBox>())
{
if (txtBx.Text == "")
return false;
}
return true;
}
private void tlEXIT_Click(object sender, EventArgs e)
{
this.Dispose();
}
private void dgBA_List_CellClick(object sender, DataGridViewCellEventArgs e)
{
int rowIndex = e.RowIndex;
DataGridViewRow row = dgBA_List.Rows[rowIndex];
dataID = Convert.ToInt16(row.Cells[0].Value);
txtBALoc.Text = row.Cells[1].Value.ToString();
txtBAName.Text = row.Cells[2].Value.ToString();
groupBox1.Enabled = false;
}
}
}
它有两个文本框,位于组框内,一个 datagridview 和 5 个工具条按钮用于添加、编辑、删除、保存和退出。我的问题是,如何重组我的代码以采用面向对象的方法?
请帮忙..谢谢