C# Controls Examples

• Find Controls from WindForms
• Implement keyboard shortcuts
• Suspend drawing WinForms Control
• Update the GUI from another thread
• Find Controls from WPF
• Button Controls
• ComboBox Controls
• DropDownList Controls
• Create DropDownList by Dictionary
• Create DropDownList by Enum
• Form Controls
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• RadioButton Controls
• TextBox Controls

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Create DropDownList with a Dictionary in WinForms/ASP.NET

• Create DropDownList with a Dictionary as DataSource in WinForms:

You can use the ComboBox control to create a DropDownList with a dictionary as a data source in WinForms. Here is an example:

Dictionary<string, string> dictionary = new Dictionary<string, string>();
dictionary.Add("1", "One");
dictionary.Add("2", "Two");
dictionary.Add("3", "Three");

comboBox1.DataSource = new BindingSource(dictionary, null);
comboBox1.DisplayMember = "Value";
comboBox1.ValueMember = "Key";

In the above example, dictionary is a dictionary that contains the items to display in the ComboBox. We create a new BindingSource object with the dictionary as the data source, and then set the DisplayMember property to "Value" and the ValueMember property to "Key". This will display the values of the dictionary items in the ComboBox, and the selected item's key will be available in the SelectedValue property.

• Create DropDownList with a Dictionary as DataSource in ASP.NET:

You can use the DropDownList control to create a DropDownList with a dictionary as a data source in ASP.NET. Here is an example:

Dictionary<string, string> dictionary = new Dictionary<string, string>();
dictionary.Add("1", "One");
dictionary.Add("2", "Two");
dictionary.Add("3", "Three");

DropDownList1.DataSource = dictionary;
DropDownList1.DataTextField = "Value";
DropDownList1.DataValueField = "Key";
DropDownList1.DataBind();

In the above example, dictionary is a dictionary that contains the items to display in the DropDownList. We set the DataSource property of the DropDownList control to the dictionary, and then set the DataTextField property to "Value" and the DataValueField property to "Key". This will display the values of the dictionary items in the DropDownList, and the selected item's key will be available in the SelectedValue property.

1. C# WinForms DropDownList with Dictionary Example:

   Create a WinForms application with a DropDownList bound to a Dictionary.

   // Populate the Dictionary
   Dictionary<int, string> dataDictionary = new Dictionary<int, string>
   {
       { 1, "Option 1" },
       { 2, "Option 2" },
       { 3, "Option 3" }
   };
   
   // Bind Dictionary to DropDownList
   comboBox.DataSource = new BindingSource(dataDictionary, null);
   comboBox.DisplayMember = "Value";
   comboBox.ValueMember = "Key";
   

2. Bind Dictionary to ComboBox in WinForms:

   Bind a Dictionary to a ComboBox in C# WinForms.

   // Assuming comboBox is the ComboBox control
   comboBox.DataSource = new BindingSource(dataDictionary, null);
   comboBox.DisplayMember = "Value";
   comboBox.ValueMember = "Key";
   

3. Populate ComboBox from Dictionary in C#:

   Populate a ComboBox with data from a Dictionary in C# WinForms.

   // Assuming comboBox is the ComboBox control
   comboBox.DataSource = new BindingSource(dataDictionary, null);
   comboBox.DisplayMember = "Value";
   comboBox.ValueMember = "Key";
   

4. Create a Dropdown List from a Dictionary in WinForms:

   Create a dropdown list in WinForms using a Dictionary as a data source.

   comboBox.DataSource = new BindingSource(dataDictionary, null);
   comboBox.DisplayMember = "Value";
   comboBox.ValueMember = "Key";
   

5. Using Dictionary as a Data Source for ComboBox in C#:

   Utilize a Dictionary as a data source for a ComboBox in C# WinForms.

   comboBox.DataSource = new BindingSource(dataDictionary, null);
   comboBox.DisplayMember = "Value";
   comboBox.ValueMember = "Key";
   

6. Dictionary to ComboBox Binding in C#:

   Bind a Dictionary to a ComboBox in C# WinForms.

   comboBox.DataSource = new BindingSource(dataDictionary, null);
   comboBox.DisplayMember = "Value";
   comboBox.ValueMember = "Key";
   

7. WinForms ComboBox Key-Value Pair:

   Implement a WinForms ComboBox with a key-value pair from a Dictionary.

   comboBox.DataSource = new BindingSource(dataDictionary, null);
   comboBox.DisplayMember = "Value";
   comboBox.ValueMember = "Key";
   

8. C# WinForms DropDownList with KeyValuePair:

   Use a KeyValuePair in a DropDownList in C# WinForms.

   comboBox.DataSource = new BindingSource(dataDictionary, null);
   comboBox.DisplayMember = "Value";
   comboBox.ValueMember = "Key";
   

9. Binding Dictionary to ComboBox in Windows Forms:

   Bind a Dictionary to a ComboBox in C# Windows Forms.

   comboBox.DataSource = new BindingSource(dataDictionary, null);
   comboBox.DisplayMember = "Value";
   comboBox.ValueMember = "Key";
   

10. How to Use a Dictionary in a ComboBox in C#:

    Utilize a Dictionary as a data source for a ComboBox in C# WinForms.

    comboBox.DataSource = new BindingSource(dataDictionary, null);
    comboBox.DisplayMember = "Value";
    comboBox.ValueMember = "Key";
    

ASP.NET:

1. ASP.NET DropDownList with Dictionary Example:

   Create an ASP.NET application with a DropDownList bound to a Dictionary.

   // Populate the Dictionary
   Dictionary<int, string> dataDictionary = new Dictionary<int, string>
   {
       { 1, "Option 1" },
       { 2, "Option 2" },
       { 3, "Option 3" }
   };
   
   // Bind Dictionary to DropDownList
   DropDownList1.DataSource = new BindingSource(dataDictionary, null);
   DropDownList1.DataTextField = "Value";
   DropDownList1.DataValueField = "Key";
   DropDownList1.DataBind();
   

2. Bind Dictionary to DropDownList in ASP.NET:

   Bind a Dictionary to a DropDownList in ASP.NET.

   // Assuming DropDownList1 is the DropDownList control
   DropDownList1.DataSource = new BindingSource(dataDictionary, null);
   DropDownList1.DataTextField = "Value";
   DropDownList1.DataValueField = "Key";
   DropDownList1.DataBind();
   

3. Populate DropDownList from Dictionary in ASP.NET:

   Populate a DropDownList with data from a Dictionary in ASP.NET.

   // Assuming DropDownList1 is the DropDownList control
   DropDownList1.DataSource = new BindingSource(dataDictionary, null);
   DropDownList1.DataTextField = "Value";
   DropDownList1.DataValueField = "Key";
   DropDownList1.DataBind();
   

4. Create a Dropdown List from a Dictionary in ASP.NET:

   Create a dropdown list in ASP.NET using a Dictionary as a data source.

   DropDownList1.DataSource = new BindingSource(dataDictionary, null);
   DropDownList1.DataTextField = "Value";
   DropDownList1.DataValueField = "Key";
   DropDownList1.DataBind();
   

5. Using Dictionary as a Data Source for DropDownList in ASP.NET:

   Utilize a Dictionary as a data source for a DropDownList in ASP.NET.

   DropDownList1.DataSource = new BindingSource(dataDictionary, null);
   DropDownList1.DataTextField = "Value";
   DropDownList1.DataValueField = "Key";
   DropDownList1.DataBind();
   

6. Dictionary to DropDownList Binding in ASP.NET:

   Bind a Dictionary to a DropDownList in ASP.NET.

   DropDownList1.DataSource = new BindingSource(dataDictionary, null);
   DropDownList1.DataTextField = "Value";
   DropDownList1.DataValueField = "Key";
   DropDownList1.DataBind();
   

7. ASP.NET DropDownList Key-Value Pair:

   Implement an ASP.NET DropDownList with a key-value pair from a Dictionary.

   DropDownList1.DataSource = new BindingSource(dataDictionary, null);
   DropDownList1.DataTextField = "Value";
   DropDownList1.DataValueField = "Key";
   DropDownList1.DataBind();
   

8. C# DropDownList with KeyValuePair in ASP.NET:

   Use a KeyValuePair in a DropDownList in ASP.NET.

   DropDownList1.DataSource = new BindingSource(dataDictionary, null);
   DropDownList1.DataTextField = "Value";
   DropDownList1.DataValueField = "Key";
   DropDownList1.DataBind();
   

9. Binding Dictionary to DropDownList in ASP.NET Web Forms:

   Bind a Dictionary to a DropDownList in ASP.NET Web Forms.

   DropDownList1.DataSource = new BindingSource(dataDictionary, null);
   DropDownList1.DataTextField = "Value";
   DropDownList1.DataValueField = "Key";
   DropDownList1.DataBind();
   

10. How to Use a Dictionary in a DropDownList in ASP.NET:

    Utilize a Dictionary as a data source for a DropDownList in ASP.NET.

    DropDownList1.DataSource = new BindingSource(dataDictionary, null);
    DropDownList1.DataTextField = "Value";
    DropDownList1.DataValueField = "Key";
    DropDownList1.DataBind();