DataGridViewComboBoxColumn은 각 행에 서로 다른 항목을 추가합니다.
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01-07-2019 - |
문제
사용자가 각 셀의 드롭다운에서 항목을 선택할 수 있는 DataGridView를 사용하여 테이블을 작성 중입니다.문제를 단순화하기 위해 열이 1개 있다고 가정하겠습니다.디자이너에서 DataGridViewComboBoxColumn을 사용하고 있습니다.해당 열의 각 행에 선택할 수 있는 다양한 항목 목록이 있도록 지원하려고 합니다.
이것이 가능한가?
해결책
예.이는 DataGridViewComboBoxCell을 사용하여 수행할 수 있습니다.
다음은 전체 열이 아닌 하나의 셀에만 항목을 추가하는 방법의 예입니다.
private void setCellComboBoxItems(DataGridView dataGrid, int rowIndex, int colIndex, object[] itemsToAdd)
{
DataGridViewComboBoxCell dgvcbc = (DataGridViewComboBoxCell) dataGrid.Rows[rowIndex].Cells[colIndex];
// You might pass a boolean to determine whether to clear or not.
dgvcbc.Items.Clear();
foreach (object itemToAdd in itemsToAdd)
{
dgvcbc.Items.Add(itemToAdd);
}
}
다른 팁
private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
{
if (e.ColumnIndex == DataGridViewComboBoxColumnNumber)
{
setCellComboBoxItems(myDataGridView, e.RowIndex, e.ColumnIndex, someObj);
}
}
누구든지 이 스레드를 발견할 경우를 대비해 이것이 VB 2008의 내 솔루션입니다.이것이 제공하는 장점은 콤보 상자의 각 값에 ID를 할당할 수 있다는 것입니다.
Private Sub FillGroups()
Try
'Create Connection and SQLCommand here.
Conn.Open()
Dim dr As SqlDataReader = cm.ExecuteReader
dgvGroups.Rows.Clear()
Dim PreviousGroup As String = ""
Dim l As New List(Of Groups)
While dr.Read
Dim g As New Groups
g.RegionID = CheckInt(dr("cg_id"))
g.RegionName = CheckString(dr("cg_name"))
g.GroupID = CheckInt(dr("vg_id"))
g.GroupName = CheckString(dr("vg_name"))
l.Add(g)
End While
dr.Close()
Conn.Close()
For Each a In (From r In l Select r.RegionName, r.RegionID).Distinct
Dim RegionID As Integer = a.RegionID 'Doing it this way avoids a warning
dgvGroups.Rows.Add(New Object() {a.RegionID, a.RegionName})
Dim c As DataGridViewComboBoxCell = CType(dgvGroups.Rows(dgvGroups.RowCount - 1).Cells(colGroup.Index), DataGridViewComboBoxCell)
c.DataSource = (From g In l Where g.RegionID = RegionID Select g.GroupID, g.GroupName).ToArray
c.DisplayMember = "GroupName"
c.ValueMember = "GroupID"
Next
Catch ex As Exception
End Try
End Sub
Private Class Groups
Private _RegionID As Integer
Public Property RegionID() As Integer
Get
Return _RegionID
End Get
Set(ByVal value As Integer)
_RegionID = value
End Set
End Property
Private _RegionName As String
Public Property RegionName() As String
Get
Return _RegionName
End Get
Set(ByVal value As String)
_RegionName = value
End Set
End Property
Private _GroupName As String
Public Property GroupName() As String
Get
Return _GroupName
End Get
Set(ByVal value As String)
_GroupName = value
End Set
End Property
Private _GroupID As Integer
Public Property GroupID() As Integer
Get
Return _GroupID
End Get
Set(ByVal value As Integer)
_GroupID = value
End Set
End Property
End Class
이것은 2개의 콤보박스열이 있는 GridView의 예이며, 콤보박스칼럼1 선택 인덱스가 변경되면 데이터베이스의 서로 다른 두 열의 데이터로 콤보박스칼럼2를 로드합니다.
private void dataGridView1_CellEndEdit(object sender, DataGridViewCellEventArgs e)
{
if (dataGridView1.Rows[e.RowIndex].Cells[0].Value != null && dataGridView1.CurrentCell.ColumnIndex == 0)
{
SqlConnection conn = new SqlConnection("data source=.;initial catalog=pharmacy;integrated security=true");
SqlCommand cmd = new SqlCommand("select [drugTypeParent],[drugTypeChild] from [drugs] where [drugName]='" + dataGridView1.Rows[e.RowIndex].Cells[0].Value.ToString() + "'", conn);
conn.Open();
SqlDataReader dr = cmd.ExecuteReader();
while (dr.Read())
{
object[] o = new object[] { dr[0].ToString(),dr[1].ToString() };
DataGridViewComboBoxCell dgvcbc = (DataGridViewComboBoxCell)dataGridView1.Rows[e.RowIndex].Cells[1];
dgvcbc.Items.Clear();
foreach (object itemToAdd in o)
{
dgvcbc.Items.Add(itemToAdd);
}
}
dr.Close();
conn.Close();
}
}
데이터 소스 설정 직후 콤보박스 셀 설정 나에게는 효과가 없어.바인딩 작업이 완료된 후에 수행되어야 합니다.나는 CellBegin을 선택했어요
빈 드롭다운의 예:
dgv1.datasource = datatable1;
dgv1.columns.add ( "cbxcol" , typeof(string) );
// different source for each comboboxcell in rows
var dict_rowInd_cbxDs = new Dictionary<int, object>();
dict_rowInd_cbxDs[1] = new list<string>(){"en" , "us"};
dict_rowInd_cbxDs[2] = new list<string>(){ "car", "bike"};
// !!!!!! setting comboboxcell after creating doesnt work here
foreach( row in dgv.Rows.asEnumerable() )
{
var cell = res_tn.dgv.CurrentCell as DataGridViewComboBoxCell;
cell.DataSource = dict_dgvRowI_cbxDs[res_tn.dgv.CurrentCell.RowIndex];
}
작업 예:
dgv1.datasource = datatable1;
dgv1.columns.add ( "cbxcol" , typeof(string) );
// different source for each comboboxcell in rows
var dict_rowInd_cbxDs = new Dictionary<int, object>();
dict_rowInd_cbxDs[1] = new list<string>(){"en" , "us"};
dict_rowInd_cbxDs[2] = new list<string>(){ "car", "bike"};
// cmboboxcell datasource Assingment Must be done after BindingComplete (not tested ) or cellbeginEdit (tested by me)
res_tn.dgv.CellBeginEdit += (s1, e1) => {
if (res_tn.dgv.CurrentCell is DataGridViewComboBoxCell) {
if (dict_dgvRowI_cbxDs.ContainsKey(res_tn.dgv.CurrentCell.RowIndex))
{
var cll = res_tn.dgv.CurrentCell as DataGridViewComboBoxCell;
cll.DataSource = dict_dgvRowI_cbxDs[res_tn.dgv.CurrentCell.RowIndex];
// required if it is list<mycustomClass>
// cll.DisplayMember = "ColName";
// cll.ValueMember = "This";
}
}
};
//Populate the Datatable with the Lookup lists
private DataTable typeDataTable(DataGridView dataGridView, Lookup<string, Element> type_Lookup, Dictionary<Element, string> type_dictionary, string strNewStyle, string strOldStyle, string strID, string strCount)
{
int row = 0;
DataTable dt = new DataTable();
dt.Columns.Add(strOldStyle, typeof(string));
dt.Columns.Add(strID, typeof(string));
dt.Columns.Add(strCount, typeof(int));
dt.Columns.Add("combobox", typeof(DataGridViewComboBoxCell));
//Add All Doc Types to ComboBoxes
DataGridViewComboBoxCell CmBx = new DataGridViewComboBoxCell();
CmBx.DataSource = new BindingSource(type_dictionary, null);
CmBx.DisplayMember = "Value";
CmBx.ValueMember = "Key";
//Add Style Comboboxes
DataGridViewComboBoxColumn Data_CmBx_Col = new DataGridViewComboBoxColumn();
Data_CmBx_Col.HeaderText = strNewStyle;
dataGridView.Columns.Add(addDataGrdViewComboBox(Data_CmBx_Col, type_dictionary));
setCellComboBoxItems(dataGridView, 1, 3, CmBx);
//Add style Rows
foreach (IGrouping<string, Element> StyleGroup in type_Lookup)
{
row++;
//Iterate through each group in the Igrouping
//Add Style Rows
dt.Rows.Add(StyleGroup.Key, row, StyleGroup.Count().ToString());
}
return dt;
}
private void setCellComboBoxItems(DataGridView dataGrid, int rowIndex, int colIndex, DataGridViewComboBoxCell CmBx)
{
DataGridViewComboBoxCell dgvcbc = (DataGridViewComboBoxCell)dataGrid.Rows[rowIndex].Cells[colIndex];
// You might pass a boolean to determine whether to clear or not.
dgvcbc.Items.Clear();
foreach (DataGridViewComboBoxCell itemToAdd in CmBx.Items)
{
dgvcbc.Items.Add(itemToAdd);
}
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