How to select a program item from the dropdown list by value

Question

How to select a dropdown list item by value programmatically in C # .NET?

Answer 1

If you know that the drop-down list contains the value you want to select, use:

ddl.SelectedValue = "2"; 

If you are not sure if this value exists, use (or you will get an exception with a null reference):

 ListItem selectedListItem = ddl.Items.FindByValue("2"); if (selectedListItem != null) { selectedListItem.Selected = true; } 

Answer 2

Please try below:

 myDropDown.SelectedIndex = myDropDown.Items.IndexOf(myDropDown.Items.FindByValue("myValue")) 

Answer 3

 ddl.SetSelectedValue("2"); 

With a convenient extension:

 public static class WebExtensions { /// <summary> /// Selects the item in the list control that contains the specified value, if it exists. /// </summary> /// <param name="dropDownList"></param> /// <param name="selectedValue">The value of the item in the list control to select</param> /// <returns>Returns true if the value exists in the list control, false otherwise</returns> public static Boolean SetSelectedValue(this DropDownList dropDownList, String selectedValue) { ListItem selectedListItem = dropDownList.Items.FindByValue(selectedValue); if (selectedListItem != null) { selectedListItem.Selected = true; return true; } else return false; } } 

Note Any code issued in a public domain. No attribution required.

Answer 4

 combobox1.SelectedValue = x; 

I suspect that you may need to hear something else, but this is what you asked for.

Answer 5

This is an easy way to select an option from the dropdown list based on the string val

 private void SetDDLs(DropDownList d,string val) { ListItem li; for (int i = 0; i < d.Items.Count; i++) { li = d.Items[i]; if (li.Value == val) { d.SelectedIndex = i; break; } } } 

Answer 6

Ian Boyd (above) had a great answer - add this to Ian Boyd’s WebExtensions class to select an item from the drop-down list based on text:

 /// <summary> /// Selects the item in the list control that contains the specified text, if it exists. /// </summary> /// <param name="dropDownList"></param> /// <param name="selectedText">The text of the item in the list control to select</param> /// <returns>Returns true if the value exists in the list control, false otherwise</returns> public static Boolean SetSelectedText(this DropDownList dropDownList, String selectedText) { ListItem selectedListItem = dropDownList.Items.FindByText(selectedText); if (selectedListItem != null) { selectedListItem.Selected = true; return true; } else return false; } 

To call it:

 WebExtensions.SetSelectedText(MyDropDownList, "MyValue"); 

Answer 7

For those who come here by search (because this topic is older than 3 years):

 string entry // replace with search value if (comboBox.Items.Contains(entry)) comboBox.SelectedIndex = comboBox.Items.IndexOf(entry); else comboBox.SelectedIndex = 0; 

Answer 8

Take a look at this article.

How to select an item in DropDownList by Asp.Net value

Answer 9

I prefer

 if(ddl.Items.FindByValue(string) != null) { ddl.Items.FindByValue(string).Selected = true; } 

Replace ddl with the drop-down list identifier and a string with the name or value of a string variable.

Answer 10

ddlPageSize.Items.FindByValue ("25"). Selected = true;