以编程方式设置下拉列表 [英] Setting dropdownlist selecteditem programmatically
问题描述
我想以编程方式设置ASP.Net下拉列表控件的 selecteditem
属性。
所以我想将值传递给下拉列表控件以设置项目等于传递值的所选项目。
假设列表已经是数据绑定,您可以在下拉列表中简单地设置 SelectedValue
属性。
list.DataSource = GetListItems(); //< - 从某个地方获取您的数据。
list.DataValueField =ValueProperty;
list.DataTextField =TextProperty;
list.DataBind();
list.SelectedValue = myValue.ToString();
myValue
变量的值将需要存在于控件数据绑定中 DataValueField
中指定的属性中。
更新 :
如果 myValue
的值不存在作为具有下拉列表选项的值,它将默认在下拉列表中选择第一个选项。 p>
I want to set the selecteditem
attribute for an ASP.Net dropdownlist control programmatically.
So I want to pass a value to the dropdownlist control to set the selected item where the item is equal to the passed value.
Assuming the list is already data bound you can simply set the SelectedValue
property on your dropdown list.
list.DataSource = GetListItems(); // <-- Get your data from somewhere.
list.DataValueField = "ValueProperty";
list.DataTextField = "TextProperty";
list.DataBind();
list.SelectedValue = myValue.ToString();
The value of the myValue
variable would need to exist in the property specified within the DataValueField
in your controls databinding.
UPDATE:
If the value of myValue
doesn't exist as a value with the dropdown list options it will default to select the first option in the dropdown list.
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