how to post value from gridview

Question

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I have a grid view like this
create, Edit,Print, ID, Name, HBL_NO, AMount
here i want to get the selected row value of HBL_NO
here create , Edit and print are image button and item template field,
when i click create button i want the HBL_NO to the corresponding row
i have tried like this , but i m getting error in that

C#

string s = gvBSV.SelectedRow.Cells[4].Text;
 Response.Redirect("Delivery_Order.aspx?BL_Code=" + ((ImageButton)sender).CommandName + "&Purpose=N&Menu_ID=" + hndMenu_ID.Value +"&HBL_NO="+s.ToString());

here the s contain the HBL_NO
but i m getting error
ie,.

Object reference not set to an instance of an object.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

<br />
Line 422:    {<br />
Line 423:        //Response.Redirect("Delivery_Order.aspx?BL_Code=" + ((ImageButton)sender).CommandName + "&Purpose=N&Menu_ID=" + hndMenu_ID.Value + "&BL_Type=" + ViewState["BL_Type"].ToString());<br />
Line 424:        string s = gvBSV.SelectedRow.Cells[4].Text;<br />
Line 425:        //Session["HBL"] = gvBSV.SelectedRow.Cells[4].Text;       <br />
Line 426:        Response.Redirect("Delivery_Order.aspx?BL_Code=" + ((ImageButton)sender).CommandName + "&Purpose=N&Menu_ID=" + hndMenu_ID.Value +"&HBL_NO=");

Posted 28-Nov-11 23:03pm

rajrprk

Updated 28-Nov-11 23:04pm

Uday P.Singh

v2

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3 solutions

Solution 2

try this..

on row cammand event..

C#

Protected void gvBSV_RowCommand(Object sender, GridViewCommandEventArgs e)
{
    GridViewRow gdvrow = (GridViewRow)((e.CommandSource).Parent.Parent);
    string s = gdvrow.cells["HBL_NO"].Text;
 
    Response.Redirect("Delivery_Order.aspx?BL_Code=" + e.CommandName + "&Purpose=N&Menu_ID=" + hndMenu_ID.Value +"&HBL_NO="+s.ToString());
}

hope this helps..

Posted 29-Nov-11 0:19am

Karthik Harve

Comments

rajrprk 29-Nov-11 6:21am

here i m getting error 'object' does not contain a definition for 'Parent'

Karthik Harve 29-Nov-11 6:53am

replace with this..

ImageButton imgBtn = (ImageButton)(e.CommandSource);
GridViewRow gdvrow = (GridViewRow)(imgBtn.Parent.Parent);
string s = gdvrow.cells["HBL_NO"].Text;

Karthik Harve 29-Nov-11 6:53am

replace with this..

ImageButton imgBtn = (ImageButton)(e.CommandSource);
GridViewRow gdvrow = (GridViewRow)(imgBtn.Parent.Parent);
string s = gdvrow.cells["HBL_NO"].Text;

Solution 4

On row command

C#

protected void rcmd(object sender, GridViewCommandEventArgs e)
    {
        try
        {
            int index = Convert.ToInt32(e.CommandArgument);
            GridViewRow row = GridView1.Rows[index];

       lblReqID.Text = row.Cells[1].Text;//assign value of any cell by cell index

    }
catch()
{
}

Posted 29-Nov-11 0:53am

uspatel

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enginbilici · Accepted Answer · 2011-11-29T00:32:00

If the error is about setting an instance value, then you should not focus on hbl_no.
Please first try to assign the value of "(ImageButton)sender).CommandName" like

C#

String cmdName = ((ImageButton)sender ).CommandName;
string s = gvBSV.SelectedRow.Cells[4].Text;
 Response.Redirect("Delivery_Order.aspx?BL_Code=" + cmdName + "&Purpose=N&Menu_ID=" + hndMenu_ID.Value +"&HBL_NO="+s.ToString());

then it will work fine.