Dear Mono Devs, mono DGVV.exe
Unhandled Exception: System.NullReferenceException: Object reference not set to an instance of an object at System.Windows.Forms.DataGridView.set_RowCount (Int32 value) [0x00000] at (wrapper remoting-invoke-with-check) System.Windows.Forms.DataGridView:set_RowCount (int) at DGVV.Form1..ctor () [0x00000] at (wrapper remoting-invoke-with-check) DGVV.Form1:.ctor () at DGVV.Program.Main () [0x00000] when setting RowCount property on a DataGridView instance in virtual mode, I get the above exception with Mono 1.2.4, 1.2.6 and 1.9. Is virtual mode of DataGridView usable in Mono (1.9)? If it is, what am I doing wrong? If it is not, what other winforms grid control do you suggest me to use? (It should have a virtual mode support... I tested SourceGrid but it does not draw properly when in virtual mode.) Best Regards, Cetin Sert http://corsis.de using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; namespace DGVV { public partial class Form1 : Form { public DataGridView dgv = new DataGridView(); public Form1() { InitializeComponent(); dgv.VirtualMode = true; dgv.CellValueNeeded += new DataGridViewCellValueEventHandler(dgv_CellValueNeeded); // Add columns to the DataGridView. DataGridViewTextBoxColumn companyNameColumn = new DataGridViewTextBoxColumn(); companyNameColumn.HeaderText = "Company Name"; companyNameColumn.Name = "Company Name"; DataGridViewTextBoxColumn contactNameColumn = new DataGridViewTextBoxColumn(); contactNameColumn.HeaderText = "Contact Name"; contactNameColumn.Name = "Contact Name"; dgv.Columns.Add(companyNameColumn); dgv.Columns.Add(contactNameColumn); dgv.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells; dgv.EditMode = DataGridViewEditMode.EditProgrammatically; dgv.AllowUserToAddRows = false; dgv.RowCount = 4; } void dgv_CellValueNeeded(object sender, DataGridViewCellValueEventArgs e) { switch (e.ColumnIndex) { case 0: e.Value = "Sertcom"; break; case 1: e.Value = e.RowIndex < 2 ? "Cetin" : "Metin"; break; } } } }
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