I am trying to learn how to use sql data adapter ... I have coded the following to check how it works ...
the problem is i want to retrieve values of 3 columns(DeptNo,DeptId,DeptName) of my database table "Sana" separately and display them in three separate text boxes ...
Through the code mentioned below I am able to retrieve the value of entire tuple of data base table together
what should I do to reach above mentioned result???
protected void Button1_Click(object sender, EventArgs e)
{
SqlConnection connect = new SqlConnection(ConfigurationManager.ConnectionStrings["TestConnectionString"].ConnectionString);
SqlCommand cmd = new SqlCommand("Select DeptNo,DeptId,DeptName from Sana where DeptName='" + TextBox1.Text + "'", connect);
SqlDataAdapter myAdapter = new SqlDataAdapter(cmd);
DataSet MyDataSet = new DataSet();
myAdapter.Fill(MyDataSet, "Departments");
object[] rowVals = new object[3];
foreach (DataTable myTable in MyDataSet.Tables)
{
foreach (DataRow myRow in myTable.Rows)
{
foreach (DataColumn myColumn in myTable.Columns)
{
Response.Write(myRow[myColumn] + "\t");
}
}
}
}
}
foreach (DataRow myRow in MyDataSet.Tables[0].Rows)
{
TextBox1.Text = myRow["DeptNo"].ToString();
TextBox2.Text = myRow["DeptId"].ToString();
...
}
Related
Sounds like an easy job but havent been able to figure it out.I have an edit profile page where all the user data is pulled from database to respective textboxes,labels etc on Page_Load.The dropdownlist is binded to a table as below.My ddl is as below :
<asp:DropDownList ID="ddlGender" runat="server" Width="160px" AutoPostBack="True" OnDataBound="ddlGender_DataBound">
</asp:DropDownList>
and is binded as below :
protected void BindGenderDropDown()
{
string CS = ConfigurationManager.ConnectionStrings["SportsActiveConnectionString"].ConnectionString;
using (SqlConnection con = new SqlConnection(CS))
{
con.Open();
SqlCommand cmd = new SqlCommand("select * from tblGenders", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
ddlGender.DataSource = ds;
ddlGender.DataTextField = "GenderName";
ddlGender.DataValueField = "GenderId";
ddlGender.DataBind();
}
ddlGender.Items.Insert(0, new ListItem("---Select---", "0"));
ddlGender.SelectedIndex = 0;
}
I am not able to set a value in the dropdownlist though.Here is what I have done :
private void ExtractData()
{
string CS = ConfigurationManager.ConnectionStrings["fgff"].ConnectionString;
using (SqlConnection con = new SqlConnection(CS))
{
con.Open();
SqlCommand cmd = new SqlCommand("Select * from tblRegPlayers1 where UserId='PL00011'", con);
SqlDataReader rdr = cmd.ExecuteReader();
while (rdr.Read())
{
string path = rdr["ProfilePicPath"].ToString();
hfImagePath.Value = Path.GetFileName(path);
txtFName.Text = rdr["FirstName"].ToString();
txtLName.Text = rdr["LastName"].ToString();
txtEmailAddress.Text = rdr["EmailAdd"].ToString();
txtContactNumber.Text = rdr["MobileNo"].ToString();
txtdob.Value = rdr["DOB"].ToString();
txtStreetAddress.Text = rdr["StreetAddress"].ToString();
txtZipCode.Text = rdr["ZipCode"].ToString();
ddlGender.Items.FindByText(rdr["Gender"].ToString()).Selected = true;
}
}
But it says 'Object is not set to an instance'. So i played around a bit and tried doing it in DataBound like this :
protected void ddlGender_DataBound(object sender, EventArgs e)
{
string CS = ConfigurationManager.ConnectionStrings["SportsActiveConnectionString"].ConnectionString;
using (SqlConnection con = new SqlConnection(CS))
{
con.Open();
SqlCommand cmd = new SqlCommand("Select * from tblRegPlayers1 where UserId='PL00011'", con);
SqlDataReader rdr = cmd.ExecuteReader();
while (rdr.Read())
{
ddlGender.Items.FindByText(rdr["Gender"].ToString()).Selected = true;
}
}
Now it doesnt throw any error and it doesnt select the value as well.
PS : 1.I have set Autopostback true for the ddl.
2.I am aware of sqlInjection and have made changes to make it look simpler.
My final PageLoad looks like this :
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
//btnReset.Visible = false;
ExtractData();
BindDisabilityDropDown();
BindGenderDropDown();
BindStateDropDown();
}
if (hfImagePath.Value == "" || hfImagePath.Value == "0")
{
imgCropped.ImageUrl = "~/ProfilePictures/DefaultProfilePicture.png";
hfImagePath.Value = "0";
}
else
{
imgCropped.ImageUrl = "~/ProfilePictures/" + hfImagePath.Value;
}
//lblRegistration.Text = Session["Button"].ToString();
}
For one, you are calling ExtractData before you have actually bound the DropDownList in the BindGenderDropDown method. This means that your dropdown will have no items when you try to look it up and set the selected item. First things first you need to move the databinding code above ExtractData.
Second, you are you trying to set the selected value in an unusual way. Instead of attempting to FindByText you should try setting SelectedValue instead.
I will assume that the contents of rdr["Gender"] in ExtractData is the GenderId you have bound to the dropdown, and not the display value in GenderName. I will also assume that GenderId is M and F and GenderName is Male and Female (although if your actual implementation varies slightly then that's ok).
Try changing:
ddlGender.Items.FindByText(rdr["Gender"].ToString()).Selected = true;
To:
ddlGender.SelectedValue = rdr["Gender"].ToString();
Also be sure to remove the code you have added for the DataBound handler, it is not necessary here.
DataSet ds = new DataSet();
da.Fill(ds);
ddlGender.DataSource = ds;
ddlGender.DataTextField = "GenderName";
ddlGender.DataValueField = "GenderId";
ddlGender.DataBind();
You are trying to set the value to a specific Column, yet you are binding it to a DataSet and not a DataTable. (A DataSet has no columns only DataTables).
Try the following assuming the DataSet has a table returned and the column names match your table structure:
string strDesiredSelection = "Male";
DataSet ds = new DataSet();
da.Fill(ds);
ddlGender.DataSource = ds.Tables[0];
ddlGender.DataTextField = "GenderName";
ddlGender.DataValueField = "GenderId";
ddlGender.DataBind();
foreach(ListItem li in ddlGender.Items){
if(li.Value.Equals(strDesiredSelection)){
ddlGender.SelectedIndex = ddlGender.Items.IndexOf(li);
}
}
Here's my code:
protected void Page_Load(object sender, EventArgs e)
{
}
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
connection db_obj1 = new connection();
SqlConnection sql_obj = db_obj1.Connect();
if (this.DropDownList1.SelectedIndex >= 0)
{
string brand = DropDownList1.Items[DropDownList1.SelectedIndex].ToString();
string query = "Select Product,Model, NetPrice, Cost, Profit from products where Brand='" + brand + "'";
// SqlDataReader query_read = query.ExecuteReader();
SqlDataAdapter adapter = new SqlDataAdapter();
SqlCommand command = new SqlCommand(query, sql_obj);
// cmd.Parameters.AddWithValue("#tab",);
DataTable table = new DataTable();
adapter.SelectCommand = command;
adapter.Fill(table);
// Response.Write(dt.Rows.Count.ToString());
GridView grd = new GridView();
grd.FindControl("GridView1");
grd.DataSource = table;
grd.DataBind();
}
}
The problem is that when I run the code, I only see the drop down list and no GridView even when I select dofferent options. I tried debugging and it seems that the table DOES get filled and the only problem that I think is in the line 'grd.FindControl("GridView1").Is this the proper way to give a gridview a data source?
According to me you should not use like
string brand = DropDownList1.Items[DropDownList1.SelectedIndex].ToString();
on behalf that try as below
string brand = DropDownList1.SelectedItem.Text;
after that fire a query.
i hope it will halpful.
After Edit now use this code
string query = "Select Product,Model, NetPrice, Cost, Profit from products where Brand='" + brand + "'";
SqlDataAdapter adapter = new SqlDataAdapter();
SqlCommand command = new SqlCommand(query, sql_obj);
// cmd.Parameters.AddWithValue("#tab",);
DataSet ds = new DataSet();
DataTable table;
adapter.SelectCommand = command;
adapter.Fill(ds, "ABC");
table = ds.Tables["ABC"];
// Response.Write(dt.Rows.Count.ToString());
GridView grd = new GridView();
grd.FindControl("GridView1");
grd.DataSource = table;
grd.DataBind();
Explanation
adapter.Fill(ds, "ABC");
here ABC is a temp name of table you can take anything.
table = ds.Tables["ABC"];
and write here same table name as you have taken a temp table name.
now try it.
In my asp project I need to write all Items form the list box into database table using TVP. I have listbox, stored procedure (passing TVP - Table Valued Parameters). The main problem is that passing DataTable is NULL, but the Session isn't. I'll send you my code form aspx.cs file (only one block, if you'll nedd more, let me know).
protected void ASPxButton1_Click(object sender, EventArgs e)
{
//DataTable dts = Session["SelectedOptions"] as DataTable;
DataTable _dt;
//_dt = new DataTable("Items");
_dt = Session["SelectedOptions"] as DataTable;
_dt.Columns.Add("Id", typeof(int));
_dt.Columns.Add("Name", typeof(string));
foreach (ListEditItem item in lbSelectedOptions.Items)
{
DataRow dr = _dt.NewRow();
dr["Id"] = item.Value;
dr["Name"] = item.Text;
}
SqlConnection con;
string conStr = ConfigurationManager.ConnectionStrings["TestConnectionString2"].ConnectionString;
con = new SqlConnection(conStr);
con.Open();
using (con)
{
SqlCommand sqlCmd = new SqlCommand("TestTVP", con);
sqlCmd.CommandType = CommandType.StoredProcedure;
SqlParameter tvpParam = sqlCmd.Parameters.AddWithValue("#testtvp", _dt);
tvpParam.SqlDbType = SqlDbType.Structured;
sqlCmd.ExecuteNonQuery();
}
con.Close();
}
EDIT
Debugging Screenshot
You are not adding the new rows to the DataTable. You need something like this:
foreach (ListEditItem item in lbSelectedOptions.Items)
{
DataRow dr = _dt.NewRow();
dr["Id"] = item.Value;
dr["Name"] = item.Text;
_dt.Rows.Add(dr);
}
A secondary concern is where are you initialising Session["SelectedOptions"]? It appears that every time ASPxButton1 is clicked the code will try and add Id and Name columns to it, even if it already contains those two columns. It would seem more logical to do something like:
_dt = Session["SelectedOptions"] as DataTable;
if (_dt == null)
{
_dt = new DataTable("Items");
_dt.Columns.Add("Id", typeof(int));
_dt.Columns.Add("Name", typeof(string));
Session.Add("SelectedOptions", _dt);
}
can you please tell me how to bind dataset to gridview
string indno = dsRasisePo.Tables[0].Rows[0]["indno"].ToString();
for (int i = 0; i < arry.Count; i++)
{
string prodid = arry[i].ToString();
string tid = RaisePurOrder.GetTid(indno, prodid);
Dataset dsQuotation=RaisePurOrder.Bindquotation(tid);
}
gvSelectQuotation.DataSource = dsQuotation;
gvSelectQuotation.DataBind();
indent no is common only so that i gave like that i want to loop it throug the array count and passing the functions i may get more than one row in dataset now what is the problem is only last row of dataset is bindning in gridview but remaining rows are not yet bind
Well, This will give an overview how to bind the data with dataset to grid view....
protected void Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
string connectionString = “server=SYS2;” + “integrated security=SSPI;” +
“database=ERPFinAccounting”;
SqlConnection myConnection;
string str_Account_Select = “SELECT * FROM AccountsTable”;
SqlCommand myCommand;
DataSet myDataSet;
myConnection = new SqlConnection(connectionString);
myConnection.Open();
myCommand = new SqlCommand(str_Account_Select, myConnection);
SqlDataAdapter mySQLDataAdapter;
myDataSet = new DataSet();
mySQLDataAdapter = new SqlDataAdapter(myCommand);
mySQLDataAdapter.Fill(myDataSet, “AccountsTable”);
GridView1.DataSource = myDataSet;
GridView1.DataBind();
}
}
i hope it will helps you
The current solution i implemented is awful!
I use a for... loop for inserting records from an ADO.NET data-table into an SQL table.
I would like to insert at once the data-table into the SQL table, without iterating...
Is that possible, or am i asking too much?
You can pass the entire DataTable as a single Table Valued Parameter and insert the entire TVP at once. The following is the example from Table-Valued Parameters in SQL Server 2008 (ADO.NET):
// Assumes connection is an open SqlConnection.
using (connection)
{
// Create a DataTable with the modified rows.
DataTable addedCategories = CategoriesDataTable.GetChanges(
DataRowState.Added);
// Define the INSERT-SELECT statement.
string sqlInsert =
"INSERT INTO dbo.Categories (CategoryID, CategoryName)"
+ " SELECT nc.CategoryID, nc.CategoryName"
+ " FROM #tvpNewCategories AS nc;"
// Configure the command and parameter.
SqlCommand insertCommand = new SqlCommand(
sqlInsert, connection);
SqlParameter tvpParam = insertCommand.Parameters.AddWithValue(
"#tvpNewCategories", addedCategories);
tvpParam.SqlDbType = SqlDbType.Structured;
tvpParam.TypeName = "dbo.CategoryTableType";
// Execute the command.
insertCommand.ExecuteNonQuery();
}
TVP are only available in SQL 2008.
I think you are looking for SQLBulkCopy.
SqlBulkCopy is the simplest solution.
using (SqlConnection dbConn = new SqlConnection(connectionString))
{
dbConn.Open();
using (SqlBulkCopy bulkCopy = new SqlBulkCopy(dbConn))
{
bulkCopy.DestinationTableName =
"dbo.MyTable";
try
{
bulkCopy.WriteToServer(myDataTable, DataRowState.Added);
}
catch (Exception ex)
{
myLogger.Error("Fail to upload session data. ", ex);
}
}
}
You can create SqlBulkCopyColumnMapping if the columns in your DataTable don't match your database table.
You can also try the following method.
private void button1_Click(object sender, EventArgs e)
{
tabevent();
DataSet ds = new DataSet();
DataTable table = new DataTable("DataFromDGV");
ds.Tables.Add(table);
foreach (DataGridViewColumn col in dataGridView1.Columns)
table.Columns.Add(col.HeaderText, typeof(string));
foreach (DataGridViewRow row in dataGridView1.Rows)
{
table.Rows.Add(row);
foreach (DataGridViewCell cell in row.Cells)
{
table.Rows[row.Index][cell.ColumnIndex] = cell.Value;
}
}
// DataTable ds1changes = ds1.Tables[0].GetChanges();
if (table != null)
{
SqlConnection dbConn = new SqlConnection(#"Data Source=wsswe;Initial Catalog=vb;User ID=sa;Password=12345");
SqlCommand dbCommand = new SqlCommand();
dbCommand.Connection = dbConn;
foreach (DataRow row in table.Rows)
{
if (row["quantity"] != null && row["amount"]!=null && row["itemname"]!=null)
{
if (row["amount"].ToString() != string.Empty)
{
dbCommand.CommandText =
"INSERT INTO Bill" +
"(Itemname,Participants,rate,Quantity,Amount)" +
"SELECT '" + Convert.ToString(row["itemname"]) + "' AS Itemname,'" + Convert.ToString(row["Partcipants"]) + "' AS Participants,'" + Convert.ToInt32(row["rate"]) + "' AS rate,'" +
Convert.ToInt32(row["quantity"]) + "' AS Quantity,'" + Convert.ToInt32(row["amount"]) + "' AS Amount";
dbCommand.Connection.Open();
dbCommand.ExecuteNonQuery();
if (dbCommand.Connection.State != ConnectionState.Closed)
{
dbCommand.Connection.Close();
}
MessageBox.Show("inserted");
}
}
}
}
}