How Do I: Show the Selected Item on a ComboBox in my Sample?

Question

Hello:

Below is my code. I do load the new value into the ComboBox, but I dont know how to have it show on the Form. The values that I load in the textBox is fine, but the ComboBox does not show what is loaded. Can someone tell me what I need to do on the line: //comboBox1.SelectedItem = TheOriginalValue; ?

private void textBox_ID_Validated(object sender, EventArgs e)
{
Control TheControlEvent = this.GetNextControl(null, true);
while (TheControlEvent != null)
{
TheEventType = TheControlEvent.GetType().Name;
TheEventName = TheControlEvent.Name;
TheEventValue = TheControlEvent.Text;
switch (TheEventType)
{
case "TextBox":
for (TheRow = 0; TheRow < dataGridViewRecord.Rows.Count - 1; TheRow++)
{
TheColumnValue = dataGridViewRecord.Rows[TheRow].Cells["Column"].Value.ToString();
TheOriginalValue = dataGridViewRecord.Rows[TheRow].Cells["TheOriginal"].Value.ToString();
if (TheEventName.Substring(7) == TheColumnValue)
{
TheControlEvent.Text = TheOriginalValue;
break;
}
}
break;
case "ComboBox":
for (TheRow = 0; TheRow < dataGridViewRecord.Rows.Count - 1; TheRow++)
{
TheColumnValue = dataGridViewRecord.Rows[TheRow].Cells["Column"].Value.ToString();
TheOriginalValue = dataGridViewRecord.Rows[TheRow].Cells["TheOriginal"].Value.ToString();
if (TheEventName.Substring(8) == TheColumnValue)
{
TheControlEvent.Text = TheOriginalValue;
//TheControlEvent.Refresh();
//comboBox1.SelectedItem = TheOriginalValue;
// NEEDS WORK TO SHOW: SelectedItem
break;
}
}
break;
default:
break;
}
TheControlEvent = this.GetNextControl(TheControlEvent, true);
}
}

Christofel Hakim · Answer

Hi Before your select the new item in combo box you need to add the new item first into that combo box items. comboBox1.Items.Add(TheOriginalValue); // add the item first comboBox1.SelectedValue = TheOriginalvalue // then select it

Gustavo · Answer

Christofen: With some things you said in the other posts I have figured it out. Thanks. I also had to do a change in my other routine to full make it work. Thanks for leading me the correct direction. (( ComboBox )TheControlEvent).Items.Add(TheOriginalValue); (( ComboBox )TheControlEvent).Text = TheOriginalValue; (( ComboBox )TheControlEvent).SelectedIndex = 0; I guess I had to do the (( ComboBox )TheControlEvent).SelectedIndex = 0; so it would show it in the Form. Then I had to use the (( ComboBox )TheControlEvent).Text in my other routine after I load all the selections. Thanks

Christofel Hakim · Answer

If the combo box already load the new item then you should try (( ComboBox )TheControlEvent).SelectedItem.Text = TheOriginalValue;

Gustavo · Answer

With the code I have... I have to use something like this: (( ComboBox )TheControlEvent).Items.Add(TheOriginalValue); (( ComboBox )TheControlEvent).SelectedValue = TheOriginalValue; It does load it but it does not show it on the ComboBox. I have to click and select it to show it for the first time.

Gustavo · Answer

Crish: Thanks but it does not work. I have to somehow define the ComboBox that its at. Loading the TextBox with: TheControlEvent.Text = TheOriginalValue; Works. But loading the ComboBox doesnt. private void textBox_ID_Validated( object sender EventArgs e) { Control TheControlEvent = this .GetNextControl( null  true ); while (TheControlEvent != null ) { TheEventType = TheControlEvent.GetType().Name; TheEventName = TheControlEvent.Name; TheEventValue = TheControlEvent.Text; switch (TheEventType) { case TextBox : for (TheRow = 0; TheRow { TheColumnValue = dataGridViewRecord.Rows[TheRow].Cells[ Column ].Value.ToString(); TheOriginalValue = dataGridViewRecord.Rows[TheRow].Cells[ TheOriginal ].Value.ToString(); if (TheEventName.Substring(7) == TheColumnValue) { TheControlEvent.Text = TheOriginalValue; break ; } } break ; case ComboBox : for (TheRow = 0; TheRow { TheColumnValue = dataGridViewRecord.Rows[TheRow].Cells[ Column ].Value.ToString(); TheOriginalValue = dataGridViewRecord.Rows[TheRow].Cells[ TheOriginal ].Value.ToString(); if (TheEventName.Substring(8) == TheColumnValue) { TheControlEvent.Text = TheOriginalValue; // This does not work // // NEEDS WORK TO SHOW: Selected Item // break ; } } break ; default : break ; } TheControlEvent = this .GetNextControl(TheControlEvent true ); } }

Crish · Answer

hi try below code comboBox1.Selectedvalue = TheOriginalValue thanks