i tried update the data to database while i change data's values in gridview

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Hi,
I tried updating the data to database and I changed data values in GridView.
I just use below code for updating, but at the time of execution, I got this error.

------------
error:
Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index.

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code :

C#

int curview = GridView1.EditIndex;
GridViewRow row = GridView1.Rows[e.RowIndex];
      
string id = GridView1.DataKeys[row.RowIndex].Value.ToString();
// int id=Convert.ToInt32(GridView1.DataKeys[curview].Value.ToString());
Response.Write(id);
TextBox tquantity = row.FindControl("txt_mtype") as TextBox;
string quan=tquantity.Text;
con.Open();
SqlCommand cmd3 = new SqlCommand("Update addtocart1 set quantity = @quantity where m_id = @AutoId", con);

cmd3.Parameters.AddWithValue("@quantity", quan.ToString());

cmd3.Parameters.AddWithValue("@AutoId", id);
cmd3.ExecuteNonQuery();

lblMessage.Text = "Record updated successfully !";
GridView1.EditIndex = -1;
this.BindData();
con.Close();

Posted 19-Dec-12 22:19pm

ramjiricky

Updated 20-Dec-12 0:47am

Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ)

v2

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Tadit Dash (ତଡିତ୍ କୁମାର ଦାଶ) · Answer 1 · 2012-12-20T00:42:00

Please modify your code a little bit like below...

C#

// Get the "DataKey" of the row being updated.
string id = GridView1.DataKeys[e.RowIndex].Value.ToString();

// Get the "index" of Row being edited.
int curview = GridView1.EditIndex;

// Get the row being edited by "curview".
GridViewRow row = GridView1.Rows[curview];

// Find the value of TextBox by "row".
TextBox tquantity = row.FindControl("txt_mtype") as TextBox;

After this continue your coding.

Try it and let me know.

Thanks...