DataGridview 从不同的表单 c# 中脱颖而出
本文关键字:脱颖而出 表单 DataGridview | 更新日期: 2023-09-27 18:33:04
我有一个Windows c#应用程序,它有一个显示访问数据库的dataGridview。当我单击"报告"按钮时,我希望显示一个小的弹出表单,该表单检查管理员密码,如果经过身份验证,网格视图应导出到Excel工作表。但是,这并没有发生,因为我想网格视图和登录是两种不同的形式。
private void button1_Click(object sender, EventArgs e)
{
try
{
OleDbConnection con = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:'Users'dell'Documents'Database5.accdb;Jet OLEDB:Database Password=sudeep;");
con.Open();
OleDbCommand cmd = new OleDbCommand("select * from Login where id='" + textBox1.Text + "' and pass='" + textBox2.Text + "'", con);
OleDbDataReader dr = cmd.ExecuteReader();
if (dr.Read() == true)
{
//MessageBox.Show("Login Successful");
this.Visible = false;
//Form4 frm = new Form4();
//frm.Show();
//Form1 fr = new Form1();
//fr.Dispose(true);
Form2 frm2 = new Form2();
frm2.Show();
this.Close();
System.Threading.Thread t = new System.Threading.Thread(new System.Threading.ThreadStart(ThreadProc1));
t.Start();
Microsoft.Office.Interop.Excel.Application ExcelApp =
new Microsoft.Office.Interop.Excel.Application();
Microsoft.Office.Interop.Excel._Workbook ExcelBook;
Microsoft.Office.Interop.Excel._Worksheet ExcelSheet;
int i = 0;
int j = 0;
//create object of excel
ExcelBook = (Microsoft.Office.Interop.Excel._Workbook)ExcelApp.Workbooks.Add(1);
ExcelSheet = (Microsoft.Office.Interop.Excel._Worksheet)ExcelBook.ActiveSheet;
//export header
for (i = 1; i <= frm2.dgv.Columns.Count; i++)
{
ExcelSheet.Cells[1, i] = frm2.dgv.Columns[i - 1].HeaderText;
}
//export data
for (i = 1; i <= frm2.dgv.RowCount; i++)
{
for (j = 1; j <= frm2.dgv.ColumnCount; j++)
{
ExcelSheet.Cells[i + 1, j] = frm2.dgv.Rows[i - 1].Cells[j - 1].Value;
}
}
ExcelApp.Visible = true;
//set font Khmer OS System to data range
Microsoft.Office.Interop.Excel.Range myRange = ExcelSheet.get_Range(
ExcelSheet.Cells[1, 1],
ExcelSheet.Cells[frm2.dgv.RowCount + 1,
frm2.dgv.ColumnCount + 1]);
Microsoft.Office.Interop.Excel.Font x = myRange.Font;
x.Name = "Arial";
x.Size = 10;
//set bold font to column header
myRange = ExcelSheet.get_Range(ExcelSheet.Cells[1, 1],
ExcelSheet.Cells[1,frm2.dgv.Columns.Count]);
x = myRange.Font;
x.Bold = true;
//autofit all columns
myRange.EntireColumn.AutoFit();
//
ExcelSheet = null;
ExcelBook = null;
ExcelApp = null;
}
else
{
MessageBox.Show("Login as adminstrator to generate report");
}
}
我的数据网格视图位于表单 2 上,我正在尝试从表单 3 即登录表单访问它我也使用了公共数据网格视图 dgv {get;set} 命令,但应用程序仍然无法打开。请帮助
您可以在要使用 datagridview 的类中添加以下行:
System.Windows.Forms.Form f = System.Windows.Forms.Application.OpenForms["FormName"]; // form name where you have dgv
并通过以下方式致电DGV:
((FormName)f).dgv.Rows.Count
在您要获取 DGV 详细信息的位置更改此设置。尝试一次
试试这个,而不是使用互操作,你可以这样做来生成可以通过excel轻松读取的CSV:
在 DataGridView 所在的 form2 中,执行以下操作:
public DataGridView DgReport = new DataGridView();
private void buttonReport_Click()
{
//assuming your dataGridview is already populated
DgReport = yourDataGridview;
Form3 form3 = new Form3(this);
form3.ShowDialog();
form3.Dispose();
}
在窗体 3 中:
private Form2 _form2 {get;set;}
public Form3(Form2 form2)
{
_form2 = form2;
}
private buttonGenerateReport_Click()
{
int columnsCount;
var writer = new StreamWriter("test.csv");
//get number of columns
columnsCount = _form2.DgReport.Columns.Count;
for (int i = 0; i < columnsCount - 1; i++)
{
writer.Write(_form2.DgReport.Columns[i].Name.ToString().ToUpper() + ",");
}
writer.WriteLine();
//write on excel
for (int i = 0; i < (_form2.DgReport.Rows.Count - 1); i++)
{
for (int j = 0; j < columnsCount; j++)
{
if (_form2.DgReport.Rows[i].Cells[j].Value != null)
{
writer.Write(_form2.DgReport.Rows[i].Cells[j].Value + ",");
}
else
{
writer.Write(",");
}
}
writer.WriteLine();
}
//close file
writer.Close();
}