How can I get textbox value from gridview which dynamically created from code behind ?

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Hello Friends,

I am creating one application and I have one problem, Please help me guys.

I am creating texting textbox in gridview from code behind c#.
and number of rows and columns are depend on one dropdown so number and columns will vary. Now in gridview very cell create textbox.
I got solution for this. How to create text for this.
following is code

C#

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if (e.Row.RowType == DataControlRowType.DataRow)
            {
               for(int i =0; i < e.Row.Cells.Count; i++)
                {
                    TextBox txt = new TextBox();
                    e.Row.Cells[i].Controls.Add(txt);
                }
            }
        }

Now i will add some values in every textbox of every cell of gridview and I want to save thease all values to database.
I tried some code as follows,

C#

protected void btnSave_Click(object sender, EventArgs e)
{
   for (var row = 0; row < GridView1.Rows.Count; row++)
    {
       for (int col = 0; col < GridView1.Rows[row].Cells.Count; col++)
         {
           TextBox txt = (TextBox)GridView1.Rows[row].Cells[col].Controls[0];
           string texboxvalue= txt.Text;

         }
    }

}

But I am not getting data from textbox and it this code giving any exception as follows

C#

"Specified argument was out of the range of valid values.
Parameter name: index"

So please help me to solve this problem.

What I have tried:

C#

protected void btnSave_Click(object sender, EventArgs e)
{
   for (var row = 0; row < GridView1.Rows.Count; row++)
    {
       for (int col = 0; col < GridView1.Rows[row].Cells.Count; col++)
         {
           TextBox txt = (TextBox)GridView1.Rows[row].Cells[col].Controls[0];
           string texboxvalue= txt.Text;

         }
    }

}

Posted 28-May-16 5:11am

Veeshal Mali

Updated 28-May-16 8:01am

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Comments

F-ES Sitecore 28-May-16 11:49am

On postback you need to re-add all of the controls you created dynamically as .net doesn't persist them for you.

http://forums.asp.net/t/1965764.aspx?Dynamically+creating+controls

Veeshal Mali 28-May-16 12:03pm

please let me know for gridview GridView1_RowDataBound() event handler sir.

Karthik_Mahalingam 28-May-16 12:37pm

instead of gridview, you shall go with creating dynamic Table.
or you can use hidden controls to get the values from dynamic gridview.
refer:Dynamically adding textbox and saving data in textbox in ASP.NET[^]

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Karthik_Mahalingam · Accepted Answer · 2016-05-28T08:00:00

Try this,
It might help you.

Create unique Id for the TextBox Control as below
and in the post back we can use Request.Form [^] object to get the values of the particular text boxes, which we can query using the name attribute of the Textbox.

C#

int i = 0;
     protected void gv_RowDataBound(object sender, GridViewRowEventArgs e)
       {

           if (e.Row.RowType == DataControlRowType.DataRow)
           {
               TextBox txt = new TextBox() { ID = "txtDynamic" + i++ };
               e.Row.Cells[0].Controls.Add(txt);

           }
       }

       protected void btnSave_Click(object sender, EventArgs e)
       {

           var Column1TextBoxes = Request.Form.AllKeys.Where(k => k.Contains("txtDynamic")).ToList();
           for (int i = 0; i < Column1TextBoxes.Count; i++)
           {
               string value = Request.Form[Column1TextBoxes[i]]; // Textbox values
           }
       }

Similarly you can create multiple controls on run time and get the values by using the name of the controls.

Note: After Postback you will have to rebind the GridView with the updated values, else you wont be able to retain the data.