DataGridViewCheckboxCell在加載數據後不會更新

Question

嘗試了一些解決方案後，我無法完成它。 我正在閱讀access.mdb文件，並且我正在填充 datagridview。 然後我添加複選框列。完成後，您可以選擇一些複選框，並將其保存在設置中。但是，當我再次開始編程複選框的值設置，但他們沒有繪製。我試過dataGridView.Refresh()，dataGridView.EndEdit()等等。我的錯誤在哪裏，我錯過了什麼？

public partial class Form1 : Form { 

    private List<int> listCheckedColumn = new List<int>(); 
    private List<string> listNewNames = new List<string>(); 

    public Form1() { 
     InitializeComponent(); 
     //Properties.Settings.Default.Reset(); //fürs debugging 
     if (!Properties.Settings.Default["pathOpenings"].Equals("leer") && !Properties.Settings.Default["pathProfiles"].Equals("leer")) { 
      loadOutputData(); 
      //update RESULT Tabelle 
     } 
     if (!Properties.Settings.Default["naSysID"].Equals("leer")) { 
      updateListCheckedColumnFromSettings(); 
      updateCheckboxes(); 
      //update die RESULT Tabelle 
     } 
     if (!Properties.Settings.Default["newNames"].Equals("leer")) { 
      //fülle die new name Liste 
      //fülle die zellen mit infos 
      //update die RESULT Tabelle 
     } 
    } 

    private void updateCheckboxes() { 
     foreach (int value in listCheckedColumn) { 
      int rowIndex = getRowIndexWithValueX(value); 
      if (Convert.ToInt32(dataGridView3.Rows[rowIndex].Cells["SystemID"].Value) == value) { 
       DataGridViewCheckBoxCell checkbox = (DataGridViewCheckBoxCell)dataGridView3.Rows[rowIndex].Cells["Nicht beachten"]; 
       checkbox.Value = checkbox.TrueValue; 
       MessageBox.Show("Row:" + checkbox.RowIndex + " Column:" + checkbox.ColumnIndex); 
      } 
     } 
    } 

    ... 

    ... 

    /// <summary> 
    /// 
    /// </summary> 
    internal void loadOutputData() { 
     var connOpenings = new OleDbConnection("Provider=Microsoft.Jet.OleDb.4.0;Data Source=" + Properties.Settings.Default["pathOpenings"] + ";"); 
     var connProfiles = new OleDbConnection("Provider=Microsoft.Jet.OleDb.4.0;Data Source=" + Properties.Settings.Default["pathProfiles"] + ";"); 

     ... 

     // 
     // System aka System Names Table 
     // 
     var sysNames = new DataTable(); 
     var adapterSysNames = new OleDbDataAdapter("SELECT SystemID, SystemName FROM Systems;", connProfiles); 
     adapterSysNames.Fill(sysNames); 
     dataGridView3.DataSource = sysNames; 
     dataGridView3.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill; 
     dataGridView3.Sort(dataGridView3.Columns[0], ListSortDirection.Ascending); 
     DataGridViewCheckBoxColumn checkedColumn = new DataGridViewCheckBoxColumn(); 
     checkedColumn.Name = "Nicht beachten"; 
     checkedColumn.FalseValue = false; 
     checkedColumn.TrueValue = true; 
     dataGridView3.Columns.Add(checkedColumn); 
     dataGridView3.CellValueChanged += new DataGridViewCellEventHandler(dataGridView3_CellValueChanged); 
     dataGridView3.CurrentCellDirtyStateChanged += new System.EventHandler(dataGridView3_CurrentCellDirtyStateChanged); 
    } 

    ... 

    private void dataGridView3_CellValueChanged(object sender, DataGridViewCellEventArgs e) { 
     if (e.ColumnIndex == dataGridView3.Columns["Nicht beachten"].Index) { 
      int cellValue = Convert.ToInt32(dataGridView3.Rows[e.RowIndex].Cells["SystemID"].Value); 
      DataGridViewCheckBoxCell checkbox = (DataGridViewCheckBoxCell)dataGridView3.Rows[e.RowIndex].Cells["Nicht beachten"]; 

      if (checkbox.Value == checkbox.TrueValue) { 
       if (!isInList(listCheckedColumn, cellValue)) { 
        listCheckedColumn.Add(cellValue); 
        listCheckedColumn.Sort(); 
        Properties.Settings.Default["naSysID"] = makeStringFromIntList(); 
        Properties.Settings.Default.Save(); 
       } 
      } else { 
       if (isInList(listCheckedColumn, cellValue)) { 
        listCheckedColumn.Remove(cellValue); 
        listCheckedColumn.Sort(); 
        Properties.Settings.Default["naSysID"] = makeStringFromIntList(); 
        Properties.Settings.Default.Save(); 
       } 
      } 
     } 

     foreach (DataGridViewRow row in dataGridView3.Rows) { 
      DataGridViewCheckBoxCell chk = (DataGridViewCheckBoxCell)row.Cells["Nicht beachten"]; 
      if (chk.Value == chk.TrueValue) { 
       MessageBox.Show("Checked- Row: " + chk.RowIndex + " Column: " + chk.ColumnIndex); 
      } 
     } 
    } 

    ... 

    private void dataGridView3_CurrentCellDirtyStateChanged(object sender, EventArgs e) { 
     if (dataGridView3.IsCurrentCellDirty && dataGridView3.CurrentCell.ColumnIndex == dataGridView3.Columns["Nicht beachten"].Index) { 
      dataGridView3.CommitEdit(DataGridViewDataErrorContexts.Commit); 
     } 
    } 

    ... 

    ... 
} 

Answer 1

你試過dataGridView.Update()嗎？也許這是有效的。