cant find control from selectedindexchanged in listview

Question

1.00/5 (1 vote)

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SQL-Server-2008R2

want be able to find control from SelectIndexChanged in listview..

C#

TexBox comment= (TextBox)item.FindControl("TextBoxL");// this code in not working in SelectIndexChanged

C#

TextBox btnModify = (TextBox)FindControl("TextBoxL");// i tried this one also but this is also not working...

C#

protected void ListView1_SelectedIndexChanged(object sender, EventArgs e)
{
   TextBox btnModify = (TextBox)FindControl("TextBoxL");
          
   SqlConnection c = new SqlConnection(ConfigurationManager.ConnectionStrings["ApplicationServices"].ConnectionString);

   int myindex = ListView1.SelectedIndex;
   string myId = ListView1.DataKeys[myindex][0].ToString();
   //testing the value returned correctly
   Response.Write(myId);
   SqlCommand cmd = new SqlCommand("insert into rply(task_id,comment,rply_name,rpl_date)values('" +  myId + "','" + btnModify.Text + "','" + s2 + "','" + DateTime.Now.ToString("MM/dd/yyyy HH:mm:ss") + "')", c);

   c.Open();
   cmd.ExecuteNonQuery();
   c.Close();          
}

Posted 21-Oct-14 1:04am

Aarti Yadav

Updated 22-Oct-14 0:31am

Nelek

v4

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Comments

ZurdoDev 21-Oct-14 8:01am

FindControl is not recursive so if you have a table structure or panel or some other control you may have to do item.Controls[0].FindControl. You'll have to examine your output to see where that control really is.

Aarti Yadav 21-Oct-14 9:05am

i tried this but item.Controls[0].FindControl. but null value is saving in databse

ZurdoDev 21-Oct-14 9:08am

Then perhaps it is Controls[1]. The point is you have to figure it out. We can't see what you have.

Richard Deeming 21-Oct-14 8:32am

Your code is vulnerable to SQL Injection[^].

NEVER use string concatenation to build a SQL query. ALWAYS use a parameterized query.

ashish__shukla 21-Oct-14 9:03am

Thanks.
I had got your point.I had updated the article as well but it was closed before the changes could be approved :-).

3 solutions

Solution 1

Which is the control in which your textbox is inside.Findcontrol searches the control tree inside a parent control.you can use it by specifying the parent control name as:

parentControl.Controls.FindControl("ControlName")

Posted 21-Oct-14 1:35am

ashish__shukla

Updated 21-Oct-14 1:36am

v2

Comments

Aarti Yadav 21-Oct-14 7:47am

TextBox is inside a listview..
and i am saveing a data into a database from SelectedIndexChanged

so in SelectedIndexChanged TextBox 's value in not saving in database.. or its not finding a textbox

and the code which u gave that is also not working..

Aarti Yadav 21-Oct-14 9:04am

there is any1 who can help me to get out of this

Solution 2

Hi,below is the pseudo code you can try.You may need to modify it a bit depending on the control id's.

C#

public void GetControl(Control control)
    {
        //parent could be listview ..so use its id
        foreach (Control ctrl in parent.Controls)
        {

            if (ctrl.GetType() == typeof(TextBox))
            {
              //control  found  ... return here
            }
           else
           {
              GetControl(ctrl);
           }

        }
    }

Posted 21-Oct-14 16:53pm

ashish__shukla

Updated 22-Oct-14 0:30am

v2

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This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Member 11148158 · Accepted Answer · 2014-10-21T20:05:00

Solution 3

use casting or making an object of the textbox on the selectedindexchanged event and then u can directly use the value of that textbox as txtboxname.text

Posted 21-Oct-14 20:05pm

Member 11148158

cant find control from selectedindexchanged in listview

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cant find control from selectedindexchanged in listview

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