Question

C# DataGridView manual fill from database (non databinding)

Asked by: conrad2010

this attached code fills a DataGridView using databinding.

I would like to manually loop through the dataset and assign columns to dataset (also assign some columns to read-only)

the second code sample shows how I'm manually filling a ListView...

How can that be done with DataGridView?

1)
 
SQL = "SELECT * FROM myTable ";
SqlDataAdapter da = new SqlDataAdapter(SQL, db);
DataTable ds = new DataTable();              
da.Fill(ds); 
this.dataGridView1.DataSource = ds;
 
2)
 
SqlConnection conn = new SqlConnection(db);
            SqlDataReader rdr = null;
            try
            {
                conn.Open();
                {
                    SqlCommand cmd = new SqlCommand("usp_getInvoicesUnpaid", conn);
                    cmd.CommandType = CommandType.StoredProcedure;
                    cmd.Parameters.Add(new SqlParameter("@companyID", this.companyID));
                    rdr = cmd.ExecuteReader();
                    while (rdr.Read())
                    {
                        ListViewItem lItem = lvInvoices.Items.Add(rdr["invoiceID"].ToString());
                        lItem.SubItems.Add(rdr["ClientName"].ToString());
                        lItem.SubItems.Add(rdr["datedue"].ToString());
                        lItem.SubItems.Add(rdr["TotalDue"].ToString());
                    }
                }
            }

                                  
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Asked On
2009-08-14 at 13:09:00ID24654160
Tags

c# winforms

Topics

C# Programming Language

,

Microsoft Visual C#.Net

,

Visual Studio

Participating Experts
1
Points
500
Comments
3

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Answers

 

by: newyuppiePosted on 2009-08-14 at 18:59:37ID: 25103664

I would still set your

dataGridView1.DataSource = ds;

like your example 1, and modify the dataset to whatever columns and data I want. So the question is how to loop through data to construct a dataset. You could try something along the lines of (UNTESTED):

DataTable ds = new DataTable();              
ds.Columns.Add("ID", typeof(int));
ds.Columns.Add("Client", typeof(string));
 
SqlConnection conn = new SqlConnection(db);
            SqlDataReader rdr = null;
            try
            {
                conn.Open();
                {
                    SqlCommand cmd = new SqlCommand("usp_getInvoicesUnpaid", conn);
                    cmd.CommandType = CommandType.StoredProcedure;
                    cmd.Parameters.Add(new SqlParameter("@companyID", this.companyID));
                    rdr = cmd.ExecuteReader();
                    while (rdr.Read())
                    {
                        ds.Rows.Add(rdr["invoiceID"].ToString(), rdr["ClientName"].ToString());
                            
                    }
                }
            }
 
this.dataGridView1.DataSource = ds;
                                              
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by: conrad2010Posted on 2009-08-15 at 09:43:56ID: 31615974

ok, that worked... good deal... one question: how can I set the columns read-only?

 

by: newyuppiePosted on 2009-08-15 at 10:55:45ID: 25106259

The datacolumns have a ReadOnly property that you must set. Look at this example http://msdn.microsoft.com/en-us/library/system.data.datacolumn.readonly(VS.71).aspx

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