Question

I have a DGV bound to a binding source generation code here.

            // dgvDocumentList
        // 
        this.dgvDocumentList.AllowUserToAddRows = false;
        this.dgvDocumentList.AllowUserToDeleteRows = false;
        this.dgvDocumentList.AutoGenerateColumns = false;
        this.dgvDocumentList.ColumnHeadersHeightSizeMode = System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
        this.dgvDocumentList.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] {
        this.dMTitleDataGridViewTextBoxColumn,
        this.urlCol,
        this.idCol});
        this.dgvDocumentList.DataSource = this.docListFetchBindingSource;
        this.dgvDocumentList.Dock = System.Windows.Forms.DockStyle.Fill;
        this.dgvDocumentList.Location = new System.Drawing.Point(3, 3);
        this.dgvDocumentList.MultiSelect = false;
        this.dgvDocumentList.Name = "dgvDocumentList";
        this.dgvDocumentList.ReadOnly = true;
        this.dgvDocumentList.SelectionMode = System.Windows.Forms.DataGridViewSelectionMode.FullRowSelect;
        this.dgvDocumentList.Size = new System.Drawing.Size(336, 493);
        this.dgvDocumentList.TabIndex = 0;
        this.dgvDocumentList.CellDoubleClick += new System.Windows.Forms.DataGridViewCellEventHandler(this.dgvDocumentList_CellContentDoubleClick);
        this.dgvDocumentList.SelectionChanged += new System.EventHandler(this.dgvDocumentList_SelectionChanged);

The Column code is here.

  // dCBModLinkDataGridViewTextBoxColumn
        // 
        this.dCBModLinkDataGridViewTextBoxColumn.DataPropertyName = "DCBModLink";
        this.dCBModLinkDataGridViewTextBoxColumn.HeaderText = "DCBModLink";
        this.dCBModLinkDataGridViewTextBoxColumn.Name = "dCBModLinkDataGridViewTextBoxColumn";
        this.dCBModLinkDataGridViewTextBoxColumn.ReadOnly = true;
        this.dCBModLinkDataGridViewTextBoxColumn.Visible = false;
        // 
        // dCBIDDataGridViewTextBoxColumn
        // 
        this.dCBIDDataGridViewTextBoxColumn.DataPropertyName = "DCBID";
        this.dCBIDDataGridViewTextBoxColumn.HeaderText = "DCBID";
        this.dCBIDDataGridViewTextBoxColumn.Name = "dCBIDDataGridViewTextBoxColumn";
        this.dCBIDDataGridViewTextBoxColumn.ReadOnly = true;
        this.dCBIDDataGridViewTextBoxColumn.Visible = false;
        // 
        // eQModModelNumberDataGridViewTextBoxColumn
        // 
        this.eQModModelNumberDataGridViewTextBoxColumn.AutoSizeMode = System.Windows.Forms.DataGridViewAutoSizeColumnMode.Fill;
        this.eQModModelNumberDataGridViewTextBoxColumn.DataPropertyName = "EQModModelNumber";
        this.eQModModelNumberDataGridViewTextBoxColumn.HeaderText = "Model Number";
        this.eQModModelNumberDataGridViewTextBoxColumn.Name = "eQModModelNumberDataGridViewTextBoxCol

As you can see, the column definition for dcbModLinkDataGridViewTextBoxColumn says visble = false;
It also says this in the properties table. It still is visible in the application when run.

If I modify the postitions of the columns in the list I get the following results. No changed other than the order they appear on the columns list.

DCBID(Visible)–DCBModLink(Invisible)–EQModModelNumber(Visible)

DCBModLink(Visble)–DCBID(InVisible)–EQModModelNumber(Visible)

EQModModelNumber(Visible)–EQModModelNumber(Invisible)–DCBID(Invisible)

I have masked the symptom of this issue by leaving the column that I want in the first slot but I dont know why this particular DGV is behaving this way. There is another DGV on the same form that works fine no matter what position the columns are in.

I looked here: First Column Not Hiding in datagridview, and here datagridview id column will not hide But they just moved the problematice columns to the right like I did.

So. My questions are.

1. Are there other setting that I am not aware of that can override the visibility pararameter?

2. Has anyone else seen this and how did they stop it?

Answer 1

i use an extension method for this which is my own.. and works very well..also this method sets the dgv client height and width programmatically.. with this ext method just

1-)add dgv to your form

2-)create lists of columns and header texts as what you want to show the user

3-) call the method as yourDGV.showTheGivenColumns(your params, yourparams, yourparams)

P.S. : i changed the names to english and add summary in english..here is the code..

/// <summary>
  /// when this method called, it sets visible = false the columns where not in List of column names
  /// The column names List count and header List count must be the same number
  /// </summary>
  /// <param name="dgvName">DGV which calls this ext method</param>
  /// <param name="Method">the data source load method of the DGV which calls this ext method</param>
  /// <param name="ColumnName">The columnNames List which contains the columns will show.. columnName List's type is List<string></param>
  /// <param name="Header">The list where you can set the dgv's headers as you prefer..it's type is also List<string></param>
  /// <returns></returns>
  public static DataGridView showTheGivenColumns(this DataGridView dgvName, object dataSourceLoadMethod, List<string> columnNameList, List<string> headerList)
            {
                dgvName.DataSource = null;
                dgvName.Columns.Clear();
                dgvName.DataSource = dataSourceLoadMethod;
                int j = columnNameList.Count;
                int m = 0;
                int s = headerList.Count;

                if (j == s)
                {

                    foreach (DataGridViewColumn d in dgvName.Columns)
                    {
                        for (int i = 0; i < j; i++)
                        {
                            if (d.Name == columnNameList[i])
                            {
                                d.HeaderText = headerList[i];
                                d.Visible = true;
                                d.Width = d.GetPreferredWidth(DataGridViewAutoSizeColumnMode.AllCells, false);

                                m += d.Width;
                                break;
                            }
                            else
                            {
                                d.Visible = false;
                            }
                        }
                    }
                }
                else
                {
                    MessageBox.Show("Count of Header and ColumnName Lists are not equal..Please Check.");
                }

///after this line if your dgv has vertical and/or horizontal scroll, method will check and set the size with this option

bool vscroll = (dgvName.DisplayedRowCount(false) < dgvName.Rows.Count);
                bool hscroll = (dgvName.DisplayedColumnCount(false) < columnNameList.Count);
                if (vscroll == true)
                {
                    int vScrollWidth = (dgvName.Controls.OfType<VScrollBar>().First()).Width;
                    dgvName.Width = m + (vScrollWidth + 5);
                }
                if ( vscroll == false)
                {
                    dgvName.Width = m + 5;
                }
                if (hscroll == true)
                {
                    int hscrollWidth = (dgvName.Controls.OfType<HScrollBar>().First()).Height;
                    dgvName.Height = ((dgvName.RowTemplate.Height * dgvName.RowCount) + dgvName.ColumnHeadersHeight) + hscrollWidth;

                }
                if (hscroll == false)
                {
                    dgvName.Height = ((dgvName.RowTemplate.Height * dgvName.RowCount) + dgvName.ColumnHeadersHeight) + 2;
                }

                dgvName.ClearSelection();
                dgvName.ReadOnly = true;
                return dgvName;
             }

YOU MAY WANT TO KNOW THESE :

1-) in your form if your dgv’s size seems bigger than total columns then please set

d.GetPreferredWidth(DataGridViewAutoSizeColumnMode.AllCells, false);

method’s .AllCells option to your form’s needs.. if you set the false to true then your dgv will show the columns which flagged as half-showed..so we never need to change this 😉

2-) in checking the needs of scrollbar code part, the numbers which added to width or height are depends to screen resolution..the numbers which i add is not the best but as much optimized for 1024*768, 1280*800 and 1366*968 resolution..You may need to change these added numbers..