Member Avatar for pharindra

you have to write code in code-behind file only

Edited by pharindra because: n/a
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  • Latest Post Latest Post by croker10

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A few practical points that connect the replies above and will get this working reliably.

The casting error that reported (a DataControlLinkButton being returned instead of a TextBox) is a symptom of relying on index-based access into a cell's Controls collection. CommandField/Buttons and validators can change the control order, so Controls[0] is brittle. 's Controls-chain shows the nesting but not the fragility: prefer explicit IDs and FindControl or declarative data sources instead of numeric indexes.

If you keep server-side handling, use TemplateField with an EditItemTemplate that contains a TextBox with a known ID, then locate it with FindControl in RowUpdating. Example pattern:

protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
{
    var row = GridView1.Rows[e.RowIndex];
    var txtName = row.FindControl("txtName") as TextBox;
    if (txtName != null) e.NewValues["Name"] = txtName.Text;
}

If the goal really is "no source-code," use a declarative DataSource (SqlDataSource or ObjectDataSource) and set the GridView's DataSourceID plus a CommandField (ShowEditButton="True"). Configure the UpdateCommand (or let ObjectDataSource handle update methods) and set DataKeyNames for the primary key; GridView and SqlDataSource then perform edit/update without code-behind. See the ASP.NET GridView editing walkthrough for details: .

Quick troubleshooting: inspect row.Controls in the debugger to see actual control types, confirm DataKeyNames are set, set GridView.EditIndex back to -1 and rebind after a successful update, or switch BoundField -> TemplateField for predictable control IDs. If posting your GridView markup (as requested), include the DataSource/fields so responses can give exact fixes.

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Member Avatar for localinternet

This code may help you:

protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
      GridViewRow r = this.GridView1.Controls[0].Controls[e.RowIndex] as GridViewRow;
      TextBox t=  r.Controls[cell_index].Controls[control_index] as Text Box;
     }

This Syntax for Grid View:

GridView.Controls(0) ------ Table

GridView.Controls(0).Controls(index) ------ GridViewRow

GridView.Controls(0).Controls(index).Controls(index) ------ TableCell. For BoundField, we can use

Edited by Ezzaral because: Added code tags. Please use them to format any code that you post.
Member Avatar for pharindra

getting null value after writting this code.

Member Avatar for pharindra

My code is:-

TextBox tname =(TextBox ) GridView1.Rows[e.RowIndex].Cells[2].Controls[0];
        ds.Tables[0].Rows[e.RowIndex ][1] = tname.Text;
        TextBox tgender = (TextBox)GridView1.Rows[e.RowIndex].Cells[3].Controls[0] ;
        ds.Tables[0].Rows[e.RowIndex][2] = tgender.Text;

when i run the application then it throwing an exception: Unable to cast object of type
'System.Web.UI.WebControls.DataControlLinkButton' to type 'System.Web.UI.WebControls.TextBox'.

Edited by Ezzaral because: Added code tags. Please use them to format any code that you post.
Member Avatar for croker10

pharindra,

Can you please supply your code for the the GridView? That would help a lot in trying to find any problems that may be in the code.

Thanks

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