我正在尝试使用网页上的dropdownlist填充2个文本框但是我无法获取所需的代码文本框以填充
我可以确认，当我使用按钮而不是下拉列表
时，下面列出的代码有效我在default.aspx中定义了下拉列表，如下所示：
<asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="SqlDataSource1" DataTextField="Player" DataValueField="ID" AppendDataBoundItems="true" AutoPostBack="true" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged">
<asp:ListItem Value="">Please Select</asp:ListItem></asp:DropDownList>`
<asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:Phocas_WorkBenchConnectionString %>" SelectCommand="SELECT ID, [PlayerFirstName] + ' ' + [PlayerLastName] as 'Player' FROM [Players]"></asp:SqlDataSource>
我在C#中创建了default.aspx.cs代码，如下所示：
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
SqlConnection sql = new SqlConnection(@"Data Source=DESKTOP-PMSK135\SQLEXPRESS;Initial Catalog=Phocas_WorkBench;Integrated Security=True");
{
SqlCommand getFirstName = new SqlCommand("Select PlayerFirstName from Players where ID = @PlayerID", sql);
SqlCommand getLastName = new SqlCommand("Select PlayerLastName from Players where ID = @PlayerID", sql);
getFirstName.Parameters.AddWithValue("@PlayerID", DropDownList1.SelectedValue);
getLastName.Parameters.AddWithValue("@PlayerID", DropDownList1.SelectedValue);
sql.Open(); //Opens Connection to the SQL Database using the definded Connection String. In this case the defined connection string is stored in "sql"
string getResults = (string)getFirstName.ExecuteScalar();
TextBox3.Text = getResults;
getResults = (string)getLastName.ExecuteScalar();
TextBox4.Text = getResults;
sql.Close();
}
}
我希望将SqlCommand的结果填充到textbox3和textbox4，其中@PlayerID等于dropdownlist中存储的结果DataValueField="ID" 1}} ID是唯一标识符
在尝试替换AddWithValue中的变量时，我尝试了许多不同的类型。看看我在下面尝试过的那些：
DropDownList1.text DropDownList1.DataValueField DropDownList1.SelectedValue DropDownList1.SelectedIndex 然而，上述情况似乎都不起作用。 向正确的方向轻推将非常有帮助
谢谢。