when i select gridview row then all gridview fields are bound to the control like textbox,dropdownlist

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C#

protected void GridView1_SelectedIndexChanged(object sender, EventArgs e)
   {

       ddlCoName.DataTextField = gvGetAllBranchInfo.SelectedRow.Cells[2].Text;
       ddlCoName.DataValueField = gvGetAllBranchInfo.SelectedRow.Cells[3].Text;
       txtName.Text = gvGetAllBranchInfo.SelectedRow.Cells[4].Text;
       txtAddress1.Text = gvGetAllBranchInfo.SelectedRow.Cells[5].Text;
       txtAddress2.Text = gvGetAllBranchInfo.SelectedRow.Cells[6].Text;
       txtAddress3.Text = gvGetAllBranchInfo.SelectedRow.Cells[7].Text;
       txtMobile.Text = gvGetAllBranchInfo.SelectedRow.Cells[8].Text;
       txtEmail.Text = gvGetAllBranchInfo.SelectedRow.Cells[9].Text;
       ddlBranchTahsil.DataTextField = gvGetAllBranchInfo.SelectedRow.Cells[11].Text;
       ddlBranchTahsil.SelectedItem.Text = gvGetAllBranchInfo.SelectedRow.Cells[10].Text;
       ddlCityPost.DataValueField = gvGetAllBranchInfo.SelectedRow.Cells[12].Text;
       ddlCityPost.DataTextField = gvGetAllBranchInfo.SelectedRow.Cells[13].Text;
       txtPin.Text = gvGetAllBranchInfo.SelectedRow.Cells[14].Text;
       ddlDistrict.DataValueField = gvGetAllBranchInfo.SelectedRow.Cells[15].Text;
       ddlDistrict.DataTextField = gvGetAllBranchInfo.SelectedRow.Cells[16].Text;
       ddlState.DataValueField = gvGetAllBranchInfo.SelectedRow.Cells[17].Text;
       ddlState.DataTextField = gvGetAllBranchInfo.SelectedRow.Cells[18].Text;
}

I have write this code.but this is not properly work
I got this error as bellow

MSIL

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:


Line 112:txtEmail.Text = gvGetAllBranchInfo.SelectedRow.Cells[9].Text;
Line 113:ddlBranchTahsil.DataTextField = gvGetAllBranchInfo.SelectedRow.Cells[11].Text;
Line 114:ddlBranchTahsil.SelectedItem.Text = gvGetAllBranchInfo.SelectedRow.Cells[10].Text;
Line 115:ddlCityPost.DataValueField = gvGetAllBranchInfo.SelectedRow.Cells[12].Text;
Line 116:ddlCityPost.DataTextField = gvGetAllBranchInfo.SelectedRow.Cells[13].Text;

Posted 1-Jun-11 1:16am

balasaheb waghmare

Updated 1-Jun-11 2:53am

pankajupadhyay29

v3

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Comments

Timberbird 1-Jun-11 7:26am

Obviously, either SelectedRow object, or its Cell[x] is null :). Put a breakpoint and check which one gives you that error

pankajupadhyay29 1-Jun-11 8:52am

wrap the code in pre tag

pankajupadhyay29 1-Jun-11 8:55am

not clear what are you doing where are these controls like ddlCoName???

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Reza Mansoori · Answer 1 · 2011-06-12T22:07:00

Hello Dear
working with DataGrid like you did is so hard,it is better that first you generate a datasource from that table by using 'Data -> Add New data Source' in VS . if table which you want to work on it is in a database , select Database from Window which displayed , if that is a class which you have generated in your code for example :

C#

public class Person
{
   public int PersonID
   {
     get;
     set;
   }
   public string PersonName
   {
     get;
     set;
   }
}

select object from Window which was displayed then next,... and VS create a datasource from that table or object or web service .
in your from add a BindingSource to your form and set its datasource that class which VS generated;
set datasource of your datagrid to BindingSource which you added to form and
set AutoGenerateColumns of DataGrid to True.
now if in your code you fill datasource of your BindingSource with list array of that generated class (for example Person) your datagrid will show all of data in BindingSource.DataSource

if you have some control in your form which you wants to show data of Current row in DataGid do this for example you have a TextBox that you want to show PersonId of Current row of DataGrid , Do this:
in designer of from select TextBox and in its property select DataBinding property and expand it , in text property which is displayed select BindingSource which you added to from and from it select property which you want textbox display it form example PersonId
now if you fill datasource of your BindingSource when you navigate in datagrid textbox displayes personid of current Row

Good luck
if you did these and had some problems , send me an E-mail and I will Send You A project which have all of them with describe