如何在Windows应用程序的组合框中默认显示-Select- [英] How to display -Select- by default in combobox in windows application

问题描述

我的应用程序中有2个组合框.我要在来自数据库的page_load事件中的组合框中显示数据.我想在组合框中以默认值显示"-Select-".然后在组合框中显示数据库值.

i have 2 combo box in my application. i am display data in combo box in page_load event from database.i want display "-Select-" by default value in combo box. and after that display database value in combo box.

推荐答案

使用此

SqlCommand comm = new SqlCommand("select * from EmpDetail");
            SqlDataAdapter adap = new SqlDataAdapter(comm);
            comm.Connection = conn;
            DataSet ds = new DataSet();
            adap.Fill(ds);
            comboBox1.Text = "-select-";
           foreach(DataRow dr1 in ds.Tables[0].Rows)
           {
               comboBox1.Items.Add(dr1["EmpName"].ToString());
           }

希望它能在绑定CombooBox之后醒来

Hope this will wok

.

if(ComboBox1.Items.Count>0)
{
ComboBox1.Items.Insert(0, "Select Item");
ComboBox1.SelectedIndex = 0;
}

从数据库绑定组合框后，您需要根据需要在第0个索引处添加一个额外的项目.
试试这个:

After binding the combobox from database you need to add one extra item at 0th Index as you required.
Try this:

ComboBox1.Items.Insert(0, new ComboBoxItem("-Select-", string.Empty));

--Amit

--Amit

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