Use of unassigned local variable 'mySqlCommand'

Question

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i try to apprve dcuments but the following error occur

C#

protected void Button1_Click(object sender, EventArgs e)
        {

            string connStr = ConfigurationManager.ConnectionStrings["mydms"].ConnectionString;
            SqlConnection mySQLconnection = new SqlConnection(connStr);
            if (mySQLconnection.State == ConnectionState.Closed)
            {
                mySQLconnection.Open();
            }
               // DropDownList drdList;
            SqlCommand mySqlCommand;


            foreach (GridViewRow row in GrdFileApprove.Rows)
            {
              
                if (row.RowType == DataControlRowType.DataRow)
                {
                    DropDownList DropDownListcontrol = row.FindControl("DropDownList4") as DropDownList;

                    SqlCommand cmd = new SqlCommand("approved", mySQLconnection);
                    
                    docc.approve(Convert.ToInt32(Session["UserID"]), Convert.ToInt32(Session["DocID"]), Convert.ToInt32(Session["ApproveID"]), Convert.ToString(Session["Login2"]));

                   
                    mySqlCommand.Parameters.Add("@UserID", SqlDbType.Int).Value = Convert.ToInt32(GrdFileApprove.DataKeys[row.RowIndex]["UserID"]);

                    mySqlCommand.Parameters.Add("@DocID", SqlDbType.Int).Value = Convert.ToInt32(GrdFileApprove.DataKeys[row.RowIndex]["DocID"]);

                    mySqlCommand.Parameters.Add("@ApproveID", SqlDbType.Int).Value = DropDownListcontrol.SelectedValue;

                    //docc.approve(Convert.ToInt32(Session["UserID"]), Convert.ToInt32(Session["DocID"]), Convert.ToInt32(Session["ApproveID"]), Convert.ToString(Session["Login2"]));

                    mySqlCommand.ExecuteNonQuery(); 
                }
                else
                {
                    apfi.Text = "Error";
                }

                
            }


            if (mySQLconnection.State == ConnectionState.Open)
            {
                mySQLconnection.Close();
            }
        }

error in this line

C#

mySqlCommand.Parameters.Add("@UserID", SqlDbType.Int).Value = Convert.ToInt32(GrdFileApprove.DataKeys[row.RowIndex]["UserID"]);

Posted 7-Oct-13 8:39am

Diya Ayesa

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**Azee** · Accepted Answer · 2013-10-07T08:45:00

Hey there,

Its quite obvious in your code, you have declared an SqlCommand variable
SqlCommand mySqlCommand; but used it without creating its object here:

C#

mySqlCommand.Parameters.Add("@UserID", SqlDbType.Int).Value = Convert.ToInt32(GrdFileApprove.DataKeys[row.RowIndex]["UserID"]);

and you are creating an object of SqlCommand here:

C#

SqlCommand cmd = new SqlCommand("approved", mySQLconnection);

but never used it.

Change the above line to:

C#

mySqlCommand = new SqlCommand("approved", mySQLconnection);

Let me know if it helps,

Azee...

Richard C Bishop · Accepted Answer · 2013-10-07T08:42:00

Change "cmd" to "mySqlCommand" or vice versa.

SqlCommand mySqlCommand = new SqlCommand("approved", mySQLconnection);
                    
                    docc.approve(Convert.ToInt32(Session["UserID"]), Convert.ToInt32(Session["DocID"]), Convert.ToInt32(Session["ApproveID"]), Convert.ToString(Session["Login2"]));

Use of unassigned local variable 'mySqlCommand'

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