asked on

UserControl Textbox

I have created a usercontrol text with some additional data binding properties. How can i get the text property of the textbox to display the displaymember whenever the selectedvalue is changed?

Matthew

namespace WindowsApplication1
{
[System.ComponentModel.LookupBindingProperties("DataSource", "DisplayMember", "ValueMember", "LookupMember")]
[System.ComponentModel.DefaultBindingProperty("SelectedValue")]
public partial class UserControl1 : TextBox
{
private Int32 selectedValue;
private string valueMember;
private string displayMember;
private object dataSource;

public object DataSource
{
get { return dataSource; }
set { dataSource = value; }
}

public string DisplayMember
{
get { return displayMember; }
set { displayMember = value; }
}

public string ValueMember
{
get { return valueMember; }
set { valueMember = value; }
}

public Int32 SelectedValue
{
get { return selectedValue; }
set { selectedValue = value; }
}

public string LookupMember
{
get { return selectedValue.ToString(); }
set { selectedValue = Convert.ToInt32(value); }
}

public UserControl1()
{
InitializeComponent();
}
}
}

athapa

Seems like this should work!
AT

public string DisplayMember
{
get { return displayMember; }
set { displayMember = value;
this.Text = displayMember;
}
}

progTiger

ASKER

that just diplyaed the name of the displaymember. I should have clearified more, I want text property to diplay the data stored in the displaymember cell.

Matthew

tpwells

if you are needing to display the SelectedValue when it changes do what athapa suggested but on the SelectedValue property

public Int32 SelectedValue
{
get { return selectedValue; }
set { selectedValue = value;
this.Text=selectedValue;
}
}

tpwells

you also need to change the reference to selectedValue this property:

public string LookupMember
{
get { return selectedValue.ToString(); }
set { selectedValue = Convert.ToInt32(value); }
}

to "SelectedValue" with a capital "S" so it will call the property and assign the Text properly in it's property call

progTiger

ASKER

that just displays selected value. I need the text property to display the data stored within the displaymember data column.

progTiger

ASKER

figured it out, here what i did.

Matthew

public partial class LookupTextBox : TextBox
{
private Int32 selectedValue;
private string valueMember;
private string displayMember;
private DataTable dt;

public LookupTextBox()
{
InitializeComponent();
}

public DataTable DT
{
get { return dt; }
set { dt = value; }
}

public string ValueMember
{
get { return valueMember; }
set { valueMember = value; }
}

public string DisplayMember
{
get { return displayMember; }
set { displayMember = value; }
}

public Int32 SelectedValue
{
get { return selectedValue; }
set
{
selectedValue = value;
if (displayMember != null)
{
try { this.Text = dt.Rows.Find(selectedValue)[displayMember].ToString(); }
catch { }
}
}
}
}

ASKER CERTIFIED SOLUTION

GranMod

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