根据下拉列表中选择的值在文本框中搜索数据

Question

我在asp.net gridview中创建了一个公司联系人列表。我需要类似于图片中的内容。如果有人以前做过，请寄给我一个链接或一些示例代码。

Answer 1

ASPX代码

<asp:Label ID="Label1" runat="server" Text="Search By"></asp:Label> 

    <asp:TextBox ID="txtSearchName" runat="server"></asp:TextBox> 

    <asp:DropDownList ID="DropDownList1" runat="server"> 
    <asp:ListItem>Name</asp:ListItem> 
     <asp:ListItem>Search By Employee Name</asp:ListItem> 
     <asp:ListItem>Search By Company Name</asp:ListItem>    
     <asp:ListItem>Search By Mobile</asp:ListItem> 
    </asp:DropDownList> 

    <asp:Button ID="btnSearch_Click" runat="server" onclick="btnSearch_Click_Click" 
     Text="Search By" /> 

C＃

using System; 
using System.Collections; 
using System.Configuration; 
using System.Data; 
using System.Linq; 
using System.Web; 
using System.Web.Security; 
using System.Web.UI; 
using System.Web.UI.HtmlControls; 
using System.Web.UI.WebControls; 
using System.Web.UI.WebControls.WebParts; 
using System.Xml.Linq; 
using System.Data.SqlClient; 

public partial class _Default : System.Web.UI.Page 
{ 
SqlConnection sqlCon = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString); 

protected void Page_Load(object sender, EventArgs e) 
{ 
    if (!IsPostBack) 
    { 
     SqlCommand cmd = new SqlCommand("Select * from tablename", sqlCon); 
     sqlCon.Open(); 
     GridView1.DataSource = cmd.ExecuteReader(); 
     GridView1.DataBind(); 
    } 
} 


protected void btnSearch_Click_Click(object sender, EventArgs e) 
{ 

    string Query = string.Empty; 
    try 
    { 
     if (sqlCon.State == ConnectionState.Closed) 
     { 
      sqlCon.Open(); 
     } 
     if (DropDownList1.SelectedValue.ToString() == "Search By Employee Name") 
     { 
      Query = "select * from tablename where EmployeeName Like '%" + txtSearchName.Text + "%'"; 
     } 
     else if (DropDownList1.SelectedValue.ToString() == "Search By Company Name") 
     { 
      Query = "select * from tablename where CompanyName Like '" + txtSearchName.Text + "%'"; 
     } 
     else if (DropDownList1.SelectedValue.ToString() == "Search By Mobile") 
     { 
      Query = "select * from tablename where Mobile Like '%" + txtSearchName.Text + "'"; 
     } 

     SqlDataAdapter sqlDa = new SqlDataAdapter(Query, sqlCon); 
     DataSet Ds = new DataSet(); 
     sqlDa.Fill(Ds); 
     GridView1.DataSource = Ds; 
     GridView1.DataBind(); 
    } 
    catch (Exception ex) 
    { 
     HttpContext.Current.Response.Write("<script>alert('wfrmGrid: 11')</script>" + ex.Message); 
    } 
    finally 
    { 
     sqlCon.Close(); 
    } 
} 

}