Data Source and Display member

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Hi!
I'm new in C# and I have this error:

System.Windows.Forms.TextBox' does not contain a definition for 'DataSource' and no extension method 'DataSource' accepting a first argument of type 'System.Windows.Forms.TextBox' could be found (are you missing a using directive or an assembly reference?)

Can somebody help me?

Posted 26-Mar-12 6:38am

alteclansing

Updated 26-Mar-12 13:21pm

Shahin Khorshidnia

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ZurdoDev 26-Mar-12 12:43pm

Show the code.

Shahin Khorshidnia 26-Mar-12 19:24pm

How is able to find the causes without checking to code?

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alteclansing · Answer 1 · 2012-03-26T06:53:00

C#

private void frmLogin_Load(object sender, EventArgs e)
       {
           string _strQuery = "";
           _strQuery = "SELECT * FROM tblMembers";
           txtEmailAdres.DataSource = this.objBasa.Read(_strQuery).Tables[0].DefaultView;
           txtEmailAdresa.DisplayMember = "email";


       }

this is a part oft teh code

ProEnggSoft · Answer 2 · 2012-03-26T06:56:00

The TextBox control does not have the DataSource property or DataSource method, hence the above error is thrown. For data binding a TextBox we have to use
DataBindings collection property of TextBox as below

VB

textBox1.DataBindings.Add _
   (New Binding("Text", ds, "customers.custName"))

which is explained here
http://msdn.microsoft.com/en-us/library/system.windows.forms.control.databindings.aspx[^]

I think this Code Project article may be helpful to you
Data binding concepts in .NET windows forms[^]

Clifford Nelson · Answer 3 · 2012-03-26T08:11:00

I would assume that you are using WPF, and if using binding you are probably using MVVM, so want to define the binding in the XAML. For wpf what you would do is use binding:

<textbox text="{Binding textBoxSource}" />

Note: for this to work, you need to set the DataContext for the form to the class containing the property textBoxSource and textBoxSource must be a proeprty. Binding does not work on fields or methods.

Data Source and Display member

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