When i select the ComboBox all rest of ComboBox selected items are changed

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Iam Creating The ComboBox Dynamically Based on input . When i select first ComboBox value
rest of The all ComboBox also changed .

Iam Adding Controls Dynamically

C#

cmbSource = new ComboBox[dtExelData.Columns.Count];
               cmbDestination = new ComboBox[dtExelData.Columns.Count];
               for (int i = 0; i <= dtExelData.Columns.Count - 1; i++)
               {
                   cmbSource[i] = new ComboBox();
                   cmbSource[i].Name = Convert.ToString("cmbSource" + i);
                   cmbSource[i].Location = new Point(100, x);
                   this.Controls.Add(cmbSource[i]);
                   cmbSource[i].DataSource = lHeader;

                   // MessageBox.Show(cmbSource[i].Name.ToString());

                   cmbDestination[i] = new ComboBox();
                   cmbDestination[i].Name = Convert.ToString("cmbDest" + i);
                   cmbDestination[i].Location = new Point(400, x);
                   this.Controls.Add(cmbDestination[i]);
                   cmbDestination[i].DataSource = dsTblColumns.Tables[0];
                   cmbDestination[i].DisplayMember = "column_name";
                   cmbDestination[i].ValueMember = "column_name";
                   x = x + 40;
               }

Please let me know how solve this ?

Posted 24-Jul-13 21:58pm

Rambabu Sapa

Updated 24-Jul-13 22:57pm

v3

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Comments

Pheonyx 25-Jul-13 4:05am

is this a windows forms app? a WPF app? a metro app?
How are you creating the combo boxes?
please use the Improve question feature to add concise code snippets were appropriate.

Rambabu Sapa 25-Jul-13 4:56am

Iam adding Controls Dynamically Which is shown below
cmbSource = new ComboBox[dtExelData.Columns.Count];
cmbDestination = new ComboBox[dtExelData.Columns.Count];
for (int i = 0; i <= dtExelData.Columns.Count - 1; i++)
{
cmbSource[i] = new ComboBox();
cmbSource[i].Name = Convert.ToString("cmbSource" + i);
cmbSource[i].Location = new Point(100, x);
this.Controls.Add(cmbSource[i]);
cmbSource[i].DataSource = lHeader;

// MessageBox.Show(cmbSource[i].Name.ToString());

cmbDestination[i] = new ComboBox();
cmbDestination[i].Name = Convert.ToString("cmbDest" + i);
cmbDestination[i].Location = new Point(400, x);
this.Controls.Add(cmbDestination[i]);
cmbDestination[i].DataSource = dsTblColumns.Tables[0];
cmbDestination[i].DisplayMember = "column_name";
cmbDestination[i].ValueMember = "column_name";
x = x + 40;
}

Pheonyx 25-Jul-13 5:01am

Is there a property called "IsSynchronizedWithCurrentItem" if so, then I believe you need to set it to false.

You've not said what type of application this is either (at least not that I could see).

2 solutions

Solution 1

this is because your all comboboxs use same datasoruce .

for every combobox you must have a datasoruce .

best regrads

Posted 25-Jul-13 0:18am

Parviz Bazgosha

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Rambabu Sapa · Accepted Answer · 2013-07-26T01:27:00

To Resovle This Problem we have Copy The Datset into New Dataset And Bind The combobox with new dataset

cmbSource = new ComboBox[dtExelData.Columns.Count];
cmbDestination = new ComboBox[dtExelData.Columns.Count];
for (int i = 0; i <= dtExelData.Columns.Count - 1; i++)
{
cmbSource[i] = new ComboBox();
cmbSource[i].Name = Convert.ToString("cmbSource" + i);
cmbSource[i].Location = new Point(70, x);
PanelControls.Controls.Add(cmbSource[i]);
DataTable newheaderdata = new DataTable(i.ToString());
newheaderdata = dsHeader.Tables[0].Copy();
cmbSource[i].DataSource = newheaderdata;
cmbSource[i].DisplayMember = "name";
cmbSource[i].ValueMember = "name";
// MessageBox.Show(cmbSource[i].Name.ToString());
cmbDestination[i] = new ComboBox();
cmbDestination[i].Name = Convert.ToString("cmbDest" + i);
cmbDestination[i].Location = new Point(300, x);
PanelControls.Controls.Add(cmbDestination[i]);

DataTable newData = new DataTable(i.ToString());
newData = dsTblColumns.Tables[0].Copy();
cmbDestination[i].DataSource = newData;
cmbDestination[i].DisplayMember = "name";
cmbDestination[i].ValueMember = "name";

x = x + 40;
}