winform 杂记
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2022-06-08 22:17:03
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一、窗体显示为对话框
效果：
代码：
public Form7()
{
InitializeComponent();
LoginForm loginform = new LoginForm();
DialogResult dg = loginform.ShowDialog();
if (dg == DialogResult.OK)
{
// 初始化代码
}
else
{
Environment.Exit(0);
}
} private void button1_Click(object sender, EventArgs e)
{
this.DialogResult = DialogResult.OK;
}二、DataGridView 设置标头、绑定数据、下拉列表事件
// 方法一：代码添加列
//dataGridView1.ColumnCount = 1;// 列数
//dataGridView1.Columns[0].Name = "第1列";
//dataGridView1.Columns[0].CellTemplate=new DataGridViewTextBoxCell();
//dataGridView1.Columns[0].ReadOnly = false;
//dataGridView1.Columns[0].SortMode = DataGridViewColumnSortMode.NotSortable;
//dataGridView1.Columns[0].AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells;
//dataGridView1.Columns[0].HeaderCell.Style.BackColor = Color.DeepSkyBlue;
// 方法二： 代码添加列
dataGridView1.AutoGenerateColumns = false;
DataGridViewTextBoxColumn col1 = new DataGridViewTextBoxColumn();
col1.HeaderText = "第1列";
col1.ReadOnly = false;
// 不排序
col1.SortMode = DataGridViewColumnSortMode.NotSortable;
//自动宽度
col1.AutoSizeMode = DataGridViewAutoSizeColumnMode.DisplayedCells;
// 列表背景颜色
col1.HeaderCell.Style.BackColor = Color.DeepSkyBlue;
dataGridView1.Columns.Add(col1);
DataGridViewComboBoxColumn Col2 = new DataGridViewComboBoxColumn();
Col2.HeaderText = "第二列";
Col2.Width = 200;
Col2.Items.AddRange(new object[] { "", "aaaaaaa", "bbbb", "ccccc" });
dataGridView1.Columns.Add(Col2);
//列冻结
dataGridView1.Columns[0].Frozen = true;
// 不显示头列
dataGridView1.RowHeadersVisible = false; for (int i = 0; i < 20; i++)
{
int index = this.dataGridView1.Rows.Add();
this.dataGridView1.Rows[index].Cells[0].Value = index + 1;
}
// 设置下拉列表选中
dataGridView1.Rows[0].Cells[1].Value = "bbbb"; ComboBox CboItemName;
TextBox control;
DataGridViewCellStyle dataGridViewCellStyle;
// 下拉列表，或文件框发生改变
private void dataGridView1_EditingControlShowing(object sender, DataGridViewEditingControlShowingEventArgs e)
{
//判断相应的列
if (dataGridView1.CurrentCell.ColumnIndex == 1 && dataGridView1.CurrentCell.RowIndex != -1)
{
CboItemName = e.Control as ComboBox;
//每次注册事件的时候先移除事件，避免不断被递归调用
CboItemName.SelectedIndexChanged -= new EventHandler(CboItemName_SelectedIndexChanged);
CboItemName.SelectedIndexChanged += new EventHandler(CboItemName_SelectedIndexChanged);
}
//只对TextBox类型的单元格进行验证
//if (dataGridView1.CurrentCell.ColumnIndex != 21 && e.Control.GetType().BaseType.Name == "TextBox")
//{
// control = new TextBox();
// control = (TextBox)e.Control;
// control.KeyPress -= new KeyPressEventHandler(control_KeyPress);
// control.KeyPress += new KeyPressEventHandler(control_KeyPress);
//}
}
private void CboItemName_SelectedIndexChanged(object sender, EventArgs e)
{
// 样式
dataGridViewCellStyle = new DataGridViewCellStyle();
dataGridViewCellStyle.Alignment = System.Windows.Forms.DataGridViewContentAlignment.MiddleCenter;
dataGridViewCellStyle.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(204)))), ((int)(((byte)(204)))), ((int)(((byte)(204)))));
dataGridViewSytle1("");
}
private void dataGridViewSytle1(string style)
{
switch (style)
{
case "":
dataGridView1[2, dataGridView1.CurrentCell.RowIndex].Value = "";
dataGridView1[2, dataGridView1.CurrentCell.RowIndex].Style = dataGridViewCellStyle;
dataGridView1[3, dataGridView1.CurrentCell.RowIndex].Value = "";
dataGridView1[3, dataGridView1.CurrentCell.RowIndex].Style = null;
break;
}
}三、导出 Excel
public static void ExportExcel(string fileName, System.Data.DataTable dt)
{
设置导出文件路径
//string path = HttpContext.Current.Server.MapPath("Export/");
设置新建文件路径及名称
//string savePath = path + DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss") + ".xls";
try
{
string saveFileName = "";
SaveFileDialog saveDialog = new SaveFileDialog();
saveDialog.DefaultExt = "xls";
saveDialog.Filter = "Excel文件|*.xls";
saveDialog.FileName = fileName;
saveDialog.ShowDialog();
saveFileName = saveDialog.FileName;
if (saveFileName.IndexOf(":") < 0) return; //被点了取消
//创建文件
FileStream file = new FileStream(saveFileName, FileMode.CreateNew, FileAccess.Write);
//以指定的字符编码向指定的流写入字符
StreamWriter sw = new StreamWriter(file, Encoding.GetEncoding("GB2312"));
StringBuilder strbu = new StringBuilder();
//写入标题
for (int i = 0; i < dt.Columns.Count; i++)
{
strbu.Append(dt.Columns[i].ColumnName.ToString() + "\t");
}
//加入换行字符串
strbu.Append(Environment.NewLine);
//写入内容
for (int i = 0; i < dt.Rows.Count; i++)
{
for (int j = 0; j < dt.Columns.Count; j++)
{
strbu.Append(dt.Rows[i][j].ToString() + "\t");
}
strbu.Append(Environment.NewLine);
}
sw.Write(strbu.ToString());
sw.Flush();
file.Flush();
sw.Close();
sw.Dispose();
file.Close();
file.Dispose();
MessageBox.Show("成功！");
}
catch (Exception ex)
{
MessageBox.Show("文件已存在！");
}
}四、串口、网口
public static SerialPort HVcomm = new SerialPort();
try
{
HVcomm.PortName = "COM1";
HVcomm.DataBits = 8;//数据位
HVcomm.BaudRate = 9600;//波特率
HVcomm.StopBits = StopBits.One;//停止位
HVcomm.Parity = Parity.None;//校验位
if (HVcomm.IsOpen == true)//如果打开状态，则先关闭一下
{
HVcomm.Close();
}
HVcomm.Open();
// 发送数据看说明书
}
catch (Exception ex)
{
} /// <summary>
/// 套接字（写）
/// </summary>
public static Socket WriteSock;
try
{
WriteSock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPEndPoint serverip = new IPEndPoint(IPAddress.Parse("192.168.50.106"), int.Parse("12345"));
WriteSock.Connect(serverip);
}
catch (Exception ex)
{
//
}
// 发送数据
string PostString = "0A0B00000300A200000B0A";
if (WriteSock.Connected == true)
{
try
{
WriteSock.Send(HexStrTobyte(PostString));
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
else
{
MessageBox.Show("没连接到PC机");
} public static byte[] HexStrTobyte(string hexString)
{
hexString = hexString.Replace(" ", "");
if ((hexString.Length % 2) != 0)
hexString += " ";
byte[] returnBytes = new byte[hexString.Length / 2];
for (int i = 0; i < returnBytes.Length; i++)
returnBytes[i] = Convert.ToByte(hexString.Substring(i * 2, 2).Trim(), 16);
return returnBytes;
}