从tetxbox获取值，然后根据gridview中的下拉选择值显示数据 [英] Take Value from the tetxbox then based on dropdown selected value display data in gridview
本文介绍了从tetxbox获取值，然后根据gridview中的下拉选择值显示数据的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个文本框和一个下拉列表，ddllist有两个值Id和Name，现在如果用户输入
1并在ddlist中选择Id，那么Id 1的数据应该显示在gridview中如果用户输入名称即。 myname并在ddlist中选择Name，然后显示基于myname的数据。
我已经通过两次按钮点击实现了这一点，但无法在ddl上实现此目的。
已实现代码
< table cellpadding = 0 cellspacing = 0 < span class =code-attribute> class = style1 >
< tr >
< td colspan = 2 >
< asp：TextBox ID = TextBox1 runat = 服务器 > < / asp：TextBox > < / td >
< td > < asp：ImageButton ID = ImageButton1 runat = server 高度 = 19px
ImageUrl = 〜/ images / calendar.png onclick = ImageButton1_Click 宽度 = 33px / > < / td >
< / tr >
< tr >
< td < span class =code-keyword>>
< asp：Button ID = ById runat = server Text = 按ID获取产品
onclick = Button3_Click / > < / td >
< td >
< asp：按钮 ID = ByName < span class =code-attribute> runat = server 文本 = 按名称获取产品
onclick = Button2_Click / > < / td >
< td >
< asp：按钮 ID = Button4 runat = server 文字 = 按日期获取产品
< span class =code-attribute> onclick = Button4_Click / > ; < / td >
< / tr > ;
< / t能够 >
按钮点击
受保护 void ById_Click（ object sender，EventArgs e）
{
string cn = ConfigurationManager.ConnectionStrings [ connectivity]。ConnectionString;
使用（SqlConnection con = new SqlConnection（cn））
{
SqlCommand command = new SqlCommand（ spgetbyid，con）;
command.CommandType = CommandType.StoredProcedure;
command.Parameters.Add（ new SqlParameter（ @id，TextBox1.Text））;
con.Open（）;
GridView1.DataSource = command.ExecuteReader（）;
GridView1.DataBind（）;
}
受保护 void ByName_Click（ object sender，EventArgs e）
{
string cn = ConfigurationManager.ConnectionStrings [ connectivity]。ConnectionString;
使用（SqlConnection con = new SqlConnection（cn））
{
SqlCommand command = new SqlCommand（ spgetpro，con）;
command.CommandType = CommandType.StoredProcedure;
command.Parameters.Add（ new SqlParameter（ @name，TextBox1.Text））;
con.Open（）;
GridView1.DataSource = command.ExecuteReader（）;
GridView1.DataBind（）;
}
}
商店程序
创建 precedure spgetbyid
@ id int
< span class =code-keyword> as
begin
select * 来自 tblproducts 其中 id = @ id
结束
创建 precedure spgetpro
@ name varchar （ 10 ）
as
开始
选择 * 来自 tblproducts 其中 name = @ name
end
希望在Dropdown中实现相同的功能
< asp：TextBox ID = txttwo runat = 服务器 > ; < / asp：TextBox > ;
< asp：DropDownList ID = ddllist runat = server 高度 = 16px AutoPostBack = true
< span class =code-attribute> onselectedindexchanged = ddllist_SelectedIndexChanged >
< asp：ListItem 值 = 0 > 选择< / asp：ListItem >
< < span class =code-leadattribute> asp：ListItem 值 = 1 > Id < / asp：ListItem >
< asp：ListItem 值 = 2 > 名称< / asp：ListItem >
< asp：ListItem 值 = 3 > 日期< / asp：ListItem >
< / asp：DropDownList >
我知道如何根据Dropdown中的选定值在gridview中显示数据/>
例如
受保护 void Page_Load（ object sender，EventArgs e）
{
if （ ！IsPostBack）
{
string cn = ConfigurationManager.ConnectionStrings [ 连接]的ConnectionString。
使用（SqlConnection connection = new SqlConnection（cn））
{
SqlCommand command = new SqlCommand（ spgetcount，连接）;
command.CommandType = CommandType.StoredProcedure;
connection.Open（）;
SqlDataReader dr = command.ExecuteReader（）;
ddl.DataTextField = country;
ddl.DataValueField = country;
ddl.DataSource = dr;
ddl.DataBind（）;
ddl.Items.Insert（ 0 ， new ListItem（ 请选择））;
}
}
}
受保护 void ddl_SelectedIndexChanged（ object sender，EventArgs e）
{
string cn = ConfigurationManager.ConnectionStrings [ connectivity]。ConnectionString;
使用（SqlConnection connection = new SqlConnection（cn））
{
SqlCommand command = new SqlCommand（ select * from country，connection）;
command.Parameters.AddWithValue（ @ country，ddl.SelectedValue）;
SqlDataAdapter da = new SqlDataAdapter（command）;
DataSet ds = new DataSet（）;
da.Fill（ds）;
GridView1.DataSource = ds;
GridView1.DataBind（）;
}
}
解决方案
您的存储过程应该是这样的
接受2个参数
1.标志 - 传递的价值类型
2.价值 - 通过什么价值
创建 过程 dsp_GridData
（
@ flag VARCHAR （ 10 ），
@ Value VARCHAR （ 10 ）
）
BEGIN
SET NOCOUNT ON
IF @ flag = ' ID'
BEGIN
SELECT desired_field FROM YourTable 其中 id = CONVERT （ int ，< span class =code-sdkkeyword> @ value ） / * AS你的id是int * /
END
IF @ flag = ' Country'
BEGIN
SELECT desired_field FROM YourTable 其中 country = @ value / * AS你的id是int * /
END
AND 所以 ..........
SET NOCOUNT OFF
END
在您的C＃代码
protected void ddl_SelectedIndexChanged（ object sender，EventArgs e）
{
string flag;
if （ddlList.SelectedValue == ID）
{
flag = ID;
}
依此类推 所有其他标志
string cn = ConfigurationManager.ConnectionStrings [ connectivity]。ConnectionString;
使用（SqlConnection connection = new SqlConnection（cn））
{
SqlCommand command = new SqlCommand（ dsp_GridData，连接）;
command.CommandType = CommandType.StoredProcedure;
command.Parameters.AddWithValue（ @ flag，flag）;
command.Parameters.AddWithValue（ @ value，TextBox1.Text）;
SqlDataAdapter da = new SqlDataAdapter（command）;
DataSet ds = new DataSet（）;
da.Fill（ds）;
GridView1.DataSource = ds;
GridView1.DataBind（）;
}
}
请记住以下几点
1.切勿在任何存储过程中使用Select *
2.而不是创建4 - 5存储过程包括1 in
你可以使用sqldatasource来绑定gridview和参数的条件，它会如果你想做那么多话就很容易。
http://www.c-sharpcorner.com/uploadfile/raj1979/working-with-sqldatasource -control-in-Asp-Net-3-5 / [ ^ ]
使用ASP.NET SQLDATASOURCE [ ^ ]
替换为以下
ddl .selecteditem.value
I have a textbox and a dropdown list,the ddllist has two values Id and Name,now if the user enters
1 and selects Id in ddlist then data of Id 1 should be displayed in gridview and if a user enters Name ie. myname and selects Name in ddlist then data based on myname should be displayed.
I have achieved this on two button clicks but unable to achieve this on ddl.
Code for Achieved
<table cellpadding="0" cellspacing="0" class="style1">
<tr>
<td colspan="2">
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox></td>
<td><asp:ImageButton ID="ImageButton1" runat="server" Height="19px"
ImageUrl="~/images/calendar.png" onclick="ImageButton1_Click" Width="33px" /> </td>
</tr>
<tr>
<td>
<asp:Button ID="ById" runat="server" Text="Get Product by Id"
onclick="Button3_Click" /></td>
<td>
<asp:Button ID="ByName" runat="server" Text="Get Product by Name"
onclick="Button2_Click" /></td>
<td>
<asp:Button ID="Button4" runat="server" Text="Get Product by Date"
onclick="Button4_Click" /></td>
</tr>
</table>
Button Click
protected void ById_Click(object sender, EventArgs e)
{
string cn = ConfigurationManager.ConnectionStrings["connectivity"].ConnectionString;
using (SqlConnection con = new SqlConnection(cn))
{
SqlCommand command = new SqlCommand("spgetbyid", con);
command.CommandType = CommandType.StoredProcedure;
command.Parameters.Add(new SqlParameter("@id", TextBox1.Text));
con.Open();
GridView1.DataSource = command.ExecuteReader();
GridView1.DataBind();
}
protected void ByName_Click(object sender, EventArgs e)
{
string cn = ConfigurationManager.ConnectionStrings["connectivity"].ConnectionString;
using (SqlConnection con = new SqlConnection(cn))
{
SqlCommand command = new SqlCommand("spgetpro", con);
command.CommandType = CommandType.StoredProcedure;
command.Parameters.Add(new SqlParameter("@name",TextBox1.Text));
con.Open();
GridView1.DataSource = command.ExecuteReader();
GridView1.DataBind();
}
}
Store Procedure
create precedure spgetbyid
@id int
as
begin
select * from tblproducts where id=@id
end
create precedure spgetpro
@name varchar(10)
as
begin
select * from tblproducts where name=@name
end
Want to Achieve the same functionality in Dropdown
<asp:TextBox ID="txttwo" runat="server"></asp:TextBox>
<asp:DropDownList ID="ddllist" runat="server" Height="16px" AutoPostBack="true"
onselectedindexchanged="ddllist_SelectedIndexChanged" >
<asp:ListItem Value="0">Select</asp:ListItem>
<asp:ListItem Value="1">Id</asp:ListItem>
<asp:ListItem Value="2">Name</asp:ListItem>
<asp:ListItem Value="3">Date</asp:ListItem>
</asp:DropDownList>
I know how to Display data in gridview based on selected value in Dropdown
Eg
protected void Page_Load(object sender, EventArgs e)
{
if(!IsPostBack)
{
string cn=ConfigurationManager.ConnectionStrings["connectivity"].ConnectionString;
using(SqlConnection connection =new SqlConnection(cn))
{
SqlCommand command = new SqlCommand("spgetcount", connection);
command.CommandType = CommandType.StoredProcedure;
connection.Open();
SqlDataReader dr = command.ExecuteReader();
ddl.DataTextField = "country";
ddl.DataValueField = "country";
ddl.DataSource=dr;
ddl.DataBind();
ddl.Items.Insert(0,new ListItem("Please Select"));
}
}
}
protected void ddl_SelectedIndexChanged(object sender, EventArgs e)
{
string cn = ConfigurationManager.ConnectionStrings["connectivity"].ConnectionString;
using (SqlConnection connection = new SqlConnection(cn))
{
SqlCommand command = new SqlCommand("select * from country", connection);
command.Parameters.AddWithValue("@country", ddl.SelectedValue);
SqlDataAdapter da = new SqlDataAdapter(command);
DataSet ds = new DataSet();
da.Fill(ds);
GridView1.DataSource = ds;
GridView1.DataBind();
}
}
解决方案
Your Stored Procedure should be like this
It will accept 2 Parameters
1. Flag - Which type of value passed
2. Value- What Value passed
Create Procedure dsp_GridData ( @flag VARCHAR(10), @Value VARCHAR(10) ) BEGIN SET NOCOUNT ON IF @flag = 'ID' BEGIN SELECT desired_field FROM YourTable where id = CONVERT(int,@value) /* AS your id is int*/ END IF @flag = 'Country' BEGIN SELECT desired_field FROM YourTable where country = @value /* AS your id is int*/ END AND so on.......... SET NOCOUNT OFF END
In your C# code
protected void ddl_SelectedIndexChanged(object sender, EventArgs e) { string flag; if(ddlList.SelectedValue == "ID") { flag = "ID"; } and so on for all other flag string cn = ConfigurationManager.ConnectionStrings["connectivity"].ConnectionString; using (SqlConnection connection = new SqlConnection(cn)) { SqlCommand command = new SqlCommand("dsp_GridData", connection); command.CommandType = CommandType.StoredProcedure; command.Parameters.AddWithValue("@flag", flag); command.Parameters.AddWithValue("@value", TextBox1.Text); SqlDataAdapter da = new SqlDataAdapter(command); DataSet ds = new DataSet(); da.Fill(ds); GridView1.DataSource = ds; GridView1.DataBind(); } }
Remember following points
1. Never Use Select * in any stored procedures
2. Instead of creating 4 - 5 stored procedure include all in 1
you can use sqldatasource for the purpose of binding gridview with condition of parameter ,it would be easy if you want to do that much only.
http://www.c-sharpcorner.com/uploadfile/raj1979/working-with-sqldatasource-control-in-Asp-Net-3-5/[^]
Using the ASP.NET SQLDATASOURCE[^]
Replace with the following
ddl.selecteditem.value
这篇关于从tetxbox获取值，然后根据gridview中的下拉选择值显示数据的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
