search by dropdownlist

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i have to make a dropdown list in wihch i have to add 5 entries when i select one entry and press search button then it will show all the result against that value and show in gridview.
please help me to do it.

Posted 18-Apr-13 20:05pm

fak_farrukh

Updated 18-Apr-13 20:17pm

Karthik Harve

v2

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Karthik Harve 19-Apr-13 2:20am

[Edit] pre tags removed

1 solution

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Sant Osha · Answer 1 · 2013-04-18T20:15:00

Solution 1

C#

//for Drop down list
string sql = "";//put your sql query
        DataSet ds = new DataSet();
        SqlDataAdapter da = new SqlDataAdapter(sql, cn);
        da.Fill(ds);

        if (ds.Tables[0].Rows.Count > 0)
        {
            ddl.DataSource = ds;
            ddl.DataTextField = "Name";
            ddl.DataValueField = "id";
            ddl.DataBind();  
       } 

//for button click
 protected void ibtnSearch_Click(object sender, ImageClickEventArgs e)
{
   string searchTXt=ddlComments.SelectedValue.ToString();
   
       string sql = "";//put your sql query
        DataSet ds = new DataSet();
        SqlDataAdapter da = new SqlDataAdapter(sql, cn);
        da.Fill(ds);

        if (ds.Tables[0].Rows.Count > 0)
        {
                Gridview.DataSource = ds;
                Gridview.DataBind();  
       } 
}

Posted 18-Apr-13 20:15pm

Sant Osha

Updated 18-Apr-13 20:16pm

v2

Comments

Karthik Harve 19-Apr-13 2:20am

[Edit] added code block with pre tags.

fak_farrukh 19-Apr-13 2:25am

sant osha in your code the values of dropdownlist are coming from database??

Sant Osha 19-Apr-13 2:30am

yes. How you want?

fak_farrukh 19-Apr-13 2:34am

but if i want to hard code these values??

Sant Osha 19-Apr-13 2:36am

then go to design view and the values one by one.
OR
in code behind
use following code:
string[] abc={"a","b","c","d"};
ddlComments.Items.AddRange(abc);

fak_farrukh 19-Apr-13 2:51am

i have applied your code its giving execption "Data keys must be specified on GridView 'GridView1' before the selected data keys can be retrieved. Use the DataKeyNames property to specify data keys"

string searchTXt=ddlComments.SelectedValue.ToString(); // at this line

Sant Osha 19-Apr-13 2:53am

paste your code here

fak_farrukh 19-Apr-13 2:54am

protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
string query = "SELECT [Model], [SN] FROM ['ISB VAS Nodes$']";
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter(query, constr);
da.Fill(ds);
if (ds.Tables[0].Rows.Count > 0)
{
GridView1.DataSource = ds;
GridView1.DataBind();
}

}

protected void Button1_Click(object sender, EventArgs e)
{
string searchTXt = GridView1.SelectedValue.ToString();
string query = "SELECT [Model], [SN] FROM ['ISB VAS Nodes$']";
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter(query, constr);
da.Fill(ds);
if (ds.Tables[0].Rows.Count > 0)
{
GridView1.DataSource = ds;
GridView1.DataBind();
}