Add Item in Datagridview Combobox Column in C#

DatagridviewComboBox otype = new DatagridviewComboBox ( );
otype.Items.Add("Item1");
            otype.Items.Add("Item2");

Delete selected Multiple Rows in Datagridview in C#

foreach(DataGridViewRow dR in DGV.SelectedRows)
            {
                DGV.Rows.Remove(dR);
            }


That's All; Simple....!
Thank you!

Switch case in C#

 private void DGV_CellEndEdit(object sender, DataGridViewCellEventArgs e)
        {
            switch (e.ColumnIndex)
            {
                case 1:
                    p1.cmd = new OleDbCommand("select pname from pmaster where code='" + DGV[e.ColumnIndex, e.RowIndex].Value + "'", p1.Cn);
                    p1.rs = p1.cmd.ExecuteReader();
                    if(p1.rs.Read()) DGV[e.ColumnIndex + 1, e.RowIndex].Value = p1.rs[0];
                    break;
                case 2:
                    break;
                default:
                    break;
            }
        }

Add Rows and Row Data by Programmatically in Datagridview C#

DGV.Rows.Add("1", "2", "3", "4", "etc");

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Fill Controls by Double click Cell in datagridview in C#

private void DGV_CellDoubleClick(object sender, DataGridViewCellEventArgs e)
        {
            C1.Text = DGV["lno", e.RowIndex].Value.ToString();
            DT.Value = Convert.ToDateTime(DGV["date1", e.RowIndex].Value);
            C2.Text = DGV["pcode", e.RowIndex].Value.ToString();
            textBox11.Text = DGV["tcode", e.RowIndex].Value.ToString();
            C3.Text = DGV["pname", e.RowIndex].Value.ToString();
            C4.Text = DGV["sname", e.RowIndex].Value.ToString();
            C5.Text = DGV["type1", e.RowIndex].Value.ToString();
            C6.Text = DGV["type2", e.RowIndex].Value.ToString();
            textBox1.Text = DGV["qty", e.RowIndex].Value.ToString();
            textBox2.Text = DGV["gram", e.RowIndex].Value.ToString();
        }


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Set Columns in Datagridview C#

void seTFlx()
        {
            DataGridViewTextBoxColumn cS = new DataGridViewTextBoxColumn();
            DataGridViewComboBoxColumn cBc = new DataGridViewComboBoxColumn();
            DataGridViewComboBoxColumn cBc1 = new DataGridViewComboBoxColumn();

            cS.HeaderText = "S.No";

            cBc.DisplayStyle = DataGridViewComboBoxDisplayStyle.Nothing;

            p1.cmd = new OleDbCommand("select pname from pmaster", p1.Cn);
            p1.rs = p1.cmd.ExecuteReader();
            while (p1.rs.Read())
            {
                cBc.Items.Add(p1.rs[0]);
                cBc1.Items.Add(p1.rs[0]);
            }
            DGV.Columns.Add(cS);
            DGV.Columns.Add(cBc);
            DGV.Columns.Add(cBc1);
            DGV.Rows.Add(100);
            for (int s = 0; s < 100; s++)
            {
                DGV[0, s].Value = s + 1;
            }
            DGV.Columns[0].ReadOnly = true;
        }

Crystal Report in C#

1) Add Reference as following

2) Add Axcrviewer9Lib view in form from Toolbox and rename control to CRV

3) Then copy this to your code section

 private void print_Load(object sender, EventArgs e)
        {
            CRAXDRT.Application crep = new CRAXDRT.Application();
            CRAXDRT.Report frep = new CRAXDRT.Report();
            this.Text = "Test Print";
            frep = crep.OpenReport("D:/Sofwares/Adagu/loan_rep.rpt", 1);
            p1.cmd = new OleDbCommand("select *,'Loan Report' as rname from loan", p1.Cn);
            p1.rs = p1.cmd.ExecuteReader();
            p1.rs.Read();
            frep.Database.SetDataSource(p1.rs);
            CRV.ViewReport();
            MessageBox.Show("Printed Successful");
        }


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MsAccess Database Connection with C#

using System.Data.OleDb;

        Cn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0; Data Source=Data.mdb");
        Cn.Open();

How to save datagridview to access database c#

for(int i = 0; i < DGV.Rows.Count - 1; i++)
                {
                    p1.cmd = new OleDbCommand("insert into pmaster(name,sname,type,gro,code,odate) values ('" + C2.Text.Trim() + "','" + DGV[1,i]+"','"+C3.Text+"','"+C1.Text.Trim()+"','"+textBox1.Text.Trim()+"','"+DateTime.Now.Date+"')",p1.Cn);
                    p1.cmd.ExecuteNonQuery();
                }

How to save datagridview to access database c#

for(int i = 0; i < DGV.Rows.Count - 1; i++)
                {
                    p1.cmd = new OleDbCommand("insert into pmaster(name,sname,type,gro,code,odate) values ('" + C2.Text.Trim() + "','" + DGV[1,i]+"','"+C3.Text+"','"+C1.Text.Trim()+"','"+textBox1.Text.Trim()+"','"+DateTime.Now.Date+"')",p1.Cn);
                    p1.cmd.ExecuteNonQuery();
                }

how to get checkbox value in c#

p1.cmd = new OleDbCommand("insert into pass(name,pass,type1,add,edit,dele) values ('" + C1.Text.Trim() + "','" + textBox1.Text + "','" + C2.Text + "'," + (Ck1.Checked ? 1 : 0) + "," + (Ck2.Checked ? 1 : 0) + "," + (Ck3.Checked ? 1 : 0) + ")", p1.Cn);

here we get ck1.checked?1:0 = 1 while checked;
ck1.checked?1:0 = 0 while Unchecked;

Thank you !

Create Text file (or any basic format files) in C#

using System.IO;

            StreamWriter File = new StreamWriter("Bar.txt");

            File.Write("<html>");

            File.Write("<title>Test File</title>");

            File.Write("<head></head>");

            File.Write("<body bgcolor=blue>Hai This is Test Body</body></html>");

            File.Close();

            System.Diagnostics.Process.Start("Bar.txt");

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Print File to Printer Different ways C#

Easy way to print file:

            PrintDocument pd = new PrintDocument();
            pd.PrinterSettings.PrinterName = "Hp Printer";
            pd.DocumentName = "Bar.txt";
            pd.Print();
            MessageBox.Show("Printer: Hp Printer" + " " + "\nFile: Bar.txt");

Another way to Print File:

         private void button1_Click(object sender, EventArgs e)
        {
            System.IO.StreamReader filetoprint;
              filetoprint = new System.IO.StreamReader(@"D:\\m.txt");
              printDocument1.Print();
              filetoprint.Close();
        }

Another way to Print File:

        var pi=new ProcessStartInfo("C:\file.docx");
        pi.UseShellExecute = true;
        pi.Verb = "print";
        var process =  System.Diagnostics.Process.Start(pi);


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Array in C#

Array
------
int[] myarray = { 100,200,300,400,500 };
string[] myarray = { "s1","s2","s3","s4","s5" };