Set selected value of a 'Select' HTML control

本文关键字：Select HTML control selected value Set of | 更新日期: 2023-09-27 17:50:21

如何使用ASP从代码隐藏文件设置Select HTML控件的选定值?。NET和c# ?

Set selected value of a 'Select' HTML control

有FindByText和FindByValue功能:

ListItem li = Select1.Items.FindByText("Three");
ListItem li = Select1.Items.FindByValue("3");
li.Selected = true;

HTML:

<select id="selUserFilterOptions" runat="server">
   <option value="1">apple</option>
   <option value="2">orange</option>
   <option value="3">strawberry</option>
</select>
c#: 

string fruitId = selUserFilterOptions.Value.ToString();

试试这个:

for (int i=0; i<=Select1.Items.Count - 1; i++)
{
    if (Select1.Items[i].Value = valueToSelect)
    {
        Select1.Items[i].Selected = true;
        // Try this too - http://msdn.microsoft.com/en-us/library/system.web.ui.htmlcontrols.htmlselect.selectedindex(v=VS.90).aspx
        //Select1.SelectedIndex = i;
    }
}

您可以简单地使用以下代码来获取HTML Select的选定选项的文本:

var selectedText = Select1.Items[Select1.SelectedIndex].Text.Trim();

Select1是你的HTML选择控件的ID

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