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Prepare: CommandText property has not been initialized

Posted on 2009-04-08
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Last Modified: 2012-05-06
Hi ,
i keep getting this message(InvalidOperationException was unhandled.....Prepare: CommandText property has not been initialized) during debugging at ......da.Update(ds, "Shot") ....

can someone please explain what it means and how i can rectify it?

many thanks
Private Sub MenuItem6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MenuItem6.Click
        
        Dim da As New SqlCeDataAdapter(sql, conn)
        Dim cb As New SqlCeCommandBuilder(da)
 
        dsNewRow = ds.Tables("Shot").NewRow()
        dsNewRow.Item("ShotID") = scorecount + 1
        dsNewRow.Item("Club") = ComboBox2.Text
        dsNewRow.Item("ActDist") = TextBox30.Text
        dsNewRow.Item("EndLie") = ComboBox6.Text
        dsNewRow.Item("PuttDist") = ComboBox9.Text
        dsNewRow.Item("WindStrength") = WeatherCond.ComboBox3.Text
        dsNewRow.Item("Assist") = WeatherCond.ComboBox5.Text
        dsNewRow.Item("Crosswind") = WeatherCond.ComboBox7.Text
        dsNewRow.Item("HoleNo") = Label5.Text
        dsNewRow.Item("RoundID") = maxroundid()
        dsNewRow.Item("BallFlight") = ComboBox1.Text
        ds.Tables("Shot").Rows.Add(dsNewRow)
        da.Update(ds, "Shot")

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Question by:baz86
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Accepted Solution

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srikanthreddyn143 earned 2000 total points
ID: 24101244
You have to specify update command for the dataadapter.Just look into attached code.I got it from Internet.
using System;
using System.Data;
using System.Data.SqlClient;
 
   class PropagateChanges {
      static void Main(){
         string connString = "server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI";
         string qry = @"select * from employee ";
         string upd = @"update employee set firstname = @firstname where id = @id";
 
         SqlConnection conn = new SqlConnection(connString);
 
         try {
            SqlDataAdapter da = new SqlDataAdapter();
            da.SelectCommand = new SqlCommand(qry, conn);
 
            DataSet ds = new DataSet();   
            da.Fill(ds, "employee");
 
            DataTable dt = ds.Tables["employee"];
 
            dt.Rows[0]["firstname"] = "W";
 
            foreach (DataRow row in dt.Rows){
               Console.WriteLine(
                  "{0} {1}",
                  row["firstname"].ToString().PadRight(15),
                  row["lastname"].ToString().PadLeft(25));
            }
 
            // Update employees
            SqlCommand cmd = new SqlCommand(upd, conn);
            cmd.Parameters.Add("@firstname",SqlDbType.NVarChar,15, "firstname");
            SqlParameter parm = cmd.Parameters.Add("@id",SqlDbType.Int,4,"id");
            parm.SourceVersion = DataRowVersion.Original;
            da.UpdateCommand = cmd;
            da.Update(ds, "employee");
         } catch(Exception e) {
            Console.WriteLine("Error: " + e);
         } finally {
            conn.Close();
         }
      }  
   }

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Expert Comment

by:srikanthreddyn143
ID: 24101261
Or If you use CommandBuilder, it will automatically take care of update statement. Please check the link

http://support.microsoft.com/kb/308055

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Author Comment

by:baz86
ID: 24103060
thanks for the reply
if you check my code snippet i have used commandbuilder..but i still get the same message
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LVL 11

Expert Comment

by:srikanthreddyn143
ID: 24106886
My Bad. What is the SQL query you are using at command object?

And also do you have to specify shotID?
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LVL 11

Expert Comment

by:srikanthreddyn143
ID: 24106966
Is SHOTID Primary Key?It seems commandbuilder works only when there is unique key values. Please look into your ShotID values during run time and also look into Update statement using
cmdBuilder.GetUpdateCommand.CommandText to know what is the update command that is getting.
0
 

Author Comment

by:baz86
ID: 24111987
this is the sql statement i run at form load
ShotID is quiet misleading here (sorry about that), it isnt a primary key  but just an increment of the shots taken.

conn.ConnectionString = ConnStr
        conn.Open()
        Dim sql As String = "SELECT * From tblShot"
        da = New SqlCeDataAdapter(sql, conn)

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LVL 11

Expert Comment

by:srikanthreddyn143
ID: 24112137
Then CommandBuilder doesnt work for it. You have to manually give the update statement for the adapter with parameters like the code I have given on the top.
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