Why am I getting \"System.Data.DataRowView\" instead of actual values in my WinForms Listbox?

Why Do You Receive "System.Data.DataRowView" When Displaying Values in a WinForms Listbox?

When displaying data in a WinForms Listbox, you may encounter the issue where instead of retrieving real values, you receive "System.Data.DataRowView." This discrepancy is attributed to several factors.

Your provided code captures data from a database using a MySqlDataAdapter and populates a DataTable with the results. The Listbox's DisplayMember property is then set to a specific column in the table, but the data source remains the entire DataTable.

One potential explanation is that you have not explicitly specified a ValueMember for the Listbox. The ValueMember property determines which value is returned when an item is selected. If the ValueMember is not set, the default behavior is to return the entire DataRowView, which includes all columns and their values.

To rectify this issue, assign the desired column name to the ValueMember property of the Listbox. This action will ensure that the Listbox displays the actual value from the selected column instead of the DataRowView object.

Alternatively, you can retrieve the specific value from the selected DataRowView using the following technique:

DataRowView drv = (DataRowView)lstNames.SelectedItem;
string valueOfItem = drv["ColumnName"].ToString();

This approach grants access to any column value within the DataRowView, providing flexibility to manipulate the data as needed.

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