string sql="select * from tb where 1=1"; sql+=string.IsNullOrEmpty(DropDownList1.SelectedValue)?"":" and name ='"+ +this.DropDownList1.SelectedValue+"'"'; 查询绑定到gridview
看不懂,举个简单的例子被,就这一段代码,小弟看不明白,直接把.ASPX的代码和相应的.CS代码贴出来呗.小弟不胜感激. 还有我在网上COPY了一段代码,可是为什么显示DATABASE未处理呢 using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Data.SqlClient; using System.Data.OracleClient; public partial class _Default : System.Web.UI.Page { OracleConnection conn; string strCon = "Data Source=(Test);Database=Test;Uid=shao;Pwd=shao"; protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { ViewState["SortOrder"] = "身份证号码"; ViewState["OrderDire"] = "ASC"; bind(); } } protected void GridView1_Sorting(object sender, GridViewSortEventArgs e) { string sPage = e.SortExpression; if (ViewState["SortOrder"].ToString() == sPage) { if (ViewState["OrderDire"].ToString() == "Desc") ViewState["OrderDire"] = "ASC"; else ViewState["OrderDire"] = "Desc"; } else { ViewState["SortOrder"] = e.SortExpression; } bind(); } public void bind() { string sqlstr = "select top 5 * from 飞狐工作室"; conn = new OracleConnection(strCon); OracleDataAdapter myda = new OracleDataAdapter(sqlstr, conn); DataSet myds = new DataSet(); conn.Open(); myda.Fill(myds, "飞狐工作室"); DataView view = myds.Tables["飞狐工作室"].DefaultView; string sort = (string)ViewState["SortOrder"] + " " + (string)ViewState["OrderDire"]; view.Sort = sort; GridView2.DataSource = view; GridView2.DataBind(); conn.Close(); } } 问题就出现在 conn = new OracleConnection(strCon); 中
Dim con As New Data.SqlClient.SqlConnection con.ConnectionString = "Data Source=(local);Initial Catalog='数 据库 名'; Integrated Security=SSPI" con.Open() Dim da As New Data.SqlClient.SqlDataAdapter(“查找数据库中相应数据的查询语句”, con) Dim mm As New Data.DataTable da.Fill(mm) GridView1.DataSource =mm; GridView1.DataBind();
DataTable dt =(DataTable) Session["YourGridViewDataSource"];
DataView dv= dt.DefaultView ;
dv.Rowfilter ="name =" +this.DropDownList1.SelectedItem.Text;
this.GridView1.DataSource =dv;
this.GridView1.DataBind();
DataTextField="SubjectName" DataValueField="Id" AutoPostBack="true" OnSelectedIndexChanged="DropDownList1_SelectedIndexChanged1">
<asp:ListItem Value="0">-=请选择=-</asp:ListItem>
</asp:DropDownList>
<asp:ObjectDataSource ID="ObjectDataSource1" runat="server" SelectMethod="GetAllSubjects"
TypeName="EducationDegree.BLL.SubjectsManager"></asp:ObjectDataSource>
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" Width="100%">
</asp:GridView>
protected void DropDownList1_SelectedIndexChanged1(object sender, EventArgs e)
{
UserInfo userInfo = Session["UserInfo"] as UserInfo;
List<Expenses> listsSub = new List<Expenses>();
List<Expenses> lists = ExpensesManager.GetListExpensesByUserId(userInfo.UserId);
for (int i = 0; i < lists.Count; i++)
{
Expenses expenses = lists[i];
if (expenses.SubjectId == Convert.ToInt32(this.DropDownList1.SelectedValue))
{
listsSub.Add(expenses);
}
}
this.GridView1.DataSourceID = null;
this.GridView1.DataSource = listsSub;
this.GridView1.DataBind();
}我把我用到的一些代码给你切一下,你看看吧,
DataView rv= dt.DefaultView ;
rv.Rowfilter ="name =" +this.DropDownList1.SelectedItem.Text;
this.GridView1.DataSource =rv;
this.GridView1.DataBind();
也可以写查询方法 绑定不同的数据源 也行
也可以用JQuery 在table中实现模糊查询
不符合条件的隐藏
sql+=string.IsNullOrEmpty(DropDownList1.SelectedValue)?"":" and name ='"+ +this.DropDownList1.SelectedValue+"'"';
查询绑定到gridview
还有我在网上COPY了一段代码,可是为什么显示DATABASE未处理呢
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.Data.OracleClient;
public partial class _Default : System.Web.UI.Page
{
OracleConnection conn;
string strCon = "Data Source=(Test);Database=Test;Uid=shao;Pwd=shao";
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
ViewState["SortOrder"] = "身份证号码";
ViewState["OrderDire"] = "ASC";
bind();
}
}
protected void GridView1_Sorting(object sender, GridViewSortEventArgs e)
{
string sPage = e.SortExpression;
if (ViewState["SortOrder"].ToString() == sPage)
{
if (ViewState["OrderDire"].ToString() == "Desc")
ViewState["OrderDire"] = "ASC";
else
ViewState["OrderDire"] = "Desc";
}
else
{
ViewState["SortOrder"] = e.SortExpression;
}
bind();
} public void bind()
{
string sqlstr = "select top 5 * from 飞狐工作室";
conn = new OracleConnection(strCon); OracleDataAdapter myda = new OracleDataAdapter(sqlstr, conn);
DataSet myds = new DataSet();
conn.Open();
myda.Fill(myds, "飞狐工作室");
DataView view = myds.Tables["飞狐工作室"].DefaultView;
string sort = (string)ViewState["SortOrder"] + " " + (string)ViewState["OrderDire"];
view.Sort = sort;
GridView2.DataSource = view;
GridView2.DataBind();
conn.Close();
}
}
问题就出现在 conn = new OracleConnection(strCon); 中
con.ConnectionString = "Data Source=(local);Initial Catalog='数 据库 名';
Integrated Security=SSPI"
con.Open()
Dim da As New Data.SqlClient.SqlDataAdapter(“查找数据库中相应数据的查询语句”, con)
Dim mm As New Data.DataTable
da.Fill(mm)
GridView1.DataSource =mm;
GridView1.DataBind();