|
Post this question in Database section.
|
|
|
|
|
|
First of all this is the Wrong Section to post this.
Are you talking about different types. If so use NVARCHAR as it takes most of the primitive data types like DateTime, Bit, Int, Float etc.
|
|
|
|
|
hii all...
i hav populated the two dropdown lists from database.
according to the item selected in the dropdown i want to change
the respective textbox value.I hav written code it works for first dropdown but not for second.whenever i change the item in dropdownlist2 it does not show any value in its respective textbox.
plz reply..
the code is:
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
PopulateDDL1();
PopulateDDL2();
}
}
public void PopulateDDL1()
{
SqlCommand cmd = new SqlCommand("Select * From [Vendor]", new SqlConnection(ConfigurationManager.ConnectionStrings["BillingSystem"].ConnectionString));
cmd.Connection.Open();
SqlDataReader dr;
dr = cmd.ExecuteReader();
DropDownList1.DataSource = dr;
DropDownList1.DataValueField = "VendorID";
DropDownList1.DataTextField = "VendorID";
DropDownList1.DataBind();
cmd.Connection.Close();
}
public void PopulateDDL2()
{
SqlCommand cmd = new SqlCommand("Select * From [Product]", new SqlConnection(ConfigurationManager.ConnectionStrings["BillingSystem"].ConnectionString));
cmd.Connection.Open();
SqlDataReader dr;
dr = cmd.ExecuteReader();
DropDownList2.DataSource = dr;
DropDownList2.DataValueField = "ProductID";
DropDownList2.DataTextField = "ProductID";
DropDownList2.DataBind();
cmd.Connection.Close();
}
protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
{
string str = "Select * From Vendor Where(VendorID='" + DropDownList1.SelectedValue + "')";
SqlCommand cmd = new SqlCommand(str, conn);
SqlDataReader dr = null;
conn.Open();
dr = cmd.ExecuteReader();
while (dr.Read())
{
TextBox1.Text = dr["VendorName"].ToString();
}
conn.Close();
}
protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e)
{
string str = "Select * From Product Where(ProductID='" + DropDownList2.SelectedValue + "')";
SqlCommand cmd = new SqlCommand(str, conn);
SqlDataReader dr = null;
conn.Open();
dr = cmd.ExecuteReader();
while (dr.Read())
{
TextBox3.Text = dr["ProductName"].ToString();
}
conn.Close();
}
|
|
|
|
|
check whether you have given autopostback property to both the dropdown
|
|
|
|
|
yaa i hav made both dropdown autopostback property to true....
|
|
|
|
|
|
your code seems to be fine.... jus check whether u have values in the database...... 
|
|
|
|
|
Make sure you have wired the event up properly in your aspx page, i.e.
<asp:dropdownlist id="DropDownList2" runat="server" autopostback="true" onselectedindexchanged="DropDownList2_SelectedIndexChanged">
Also, put a breakpoint at the start of your DropDownList2_SelectedIndexChanged method to see if it is being called at all.
|
|
|
|
|
Is the AutoPostBack property of that dropdown set to True?
MP
|
|
|
|
|
|
i have done the same thing which u want i just use daset instead of datareader try it
protected void Page_Load(object sender, EventArgs e)
{
DAL Helper = new DAL();
Helper.ConnectionString = "Data Source=.\\SQLEXPRESS;AttachDbFilename=|DataDirectory|Coupon Management.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True";
string query = "select CouponName from CouponType";
ds = Helper.ExecuteDataSet(CommandType.Text, query, null);
if (!IsPostBack)
{
ddlCType.DataSource = ds;
ddlCType.DataValueField = "CouponName";
ddlCType.DataTextField = "CouponName";
ddlCType.DataSourceID = String.Empty;
}
}
protected DataSet GetData(string sqlCommand)
{
da1 = new SqlDataAdapter(sqlCommand, cnx );
ds = new DataSet();
da1.Fill(ds );
return ds ;
}
protected void DropDownList1_TextChanged(object sender, EventArgs e)
{
cnx.Open();
SqlCommand ddlcmd = new SqlCommand();
commandText = "SELECT MAX(CouponTransaction.SerialEnd),CouponType.Price FROM CouponType INNER JOIN CouponTransaction ON CouponType.CouponTypeID = CouponTransaction.CouponTypeID WHERE CouponType.CouponName= '" + ddlCType.SelectedValue + "'GROUP BY CouponType.Price";
ds = new DataSet();
ds = GetData(commandText);
if (ds.Tables[0].Rows.Count!=0 )
{
txtSFrom.Text = ds.Tables[0].Rows[0][0].ToString();
Txtprice.Text = ds.Tables[0].Rows[0][1].ToString();
cnx.Close();
}
}
|
|
|
|
|
thanks .... 
|
|
|
|
|
|
hi
I have windows vista and
when I debug my website project in visual studio,
my browser doesn't run.
after that i checked my IIS in control panel but again browser doesn't work.
THX.
|
|
|
|
|
you mean to say, You are not able to debug Asp.Net application?
|
|
|
|
|
HI
Thanks for your attention
I mean that when i debug my website,IE said "can not find server".
|
|
|
|
|
i have a dropdownlist which a different values on its textchanged i want to populate two textboxs. one to show Maximum Serial end and another show Serial End.
when i select 3 value in textbox it works as i like. but other than 3 i slect any value it show error There is not row at position 0
protected void DropDownList1_TextChanged(object sender, EventArgs e)
{
cnx.Open();
SqlCommand ddlcmd = new SqlCommand();
commandText = "SELECT MAX(CouponTransaction.SerialEnd),CouponType.Price FROM CouponType INNER JOIN CouponTransaction ON CouponType.CouponTypeID = CouponTransaction.CouponTypeID WHERE CouponType.CouponName= '" + ddlCType.SelectedValue + "'GROUP BY CouponType.Price";
ds = new DataSet();
ds = GetData(commandText);
txtSFrom.Text =ds.Tables[0].Rows[0][0].ToString();
Txtprice.Text = ds.Tables[0].Rows[0][1].ToString();
cnx.Close();
}
|
|
|
|
|
ds = new DataSet();
ds = GetData(commandText);
if(ds.rows.count !=0)
{
txtSFrom.Text =ds.Tables[0].Rows[0][0].ToString();
Txtprice.Text = ds.Tables[0].Rows[0][1].ToString();
}
cnx.Close();
|
|
|
|
|
it show error in if statement that Doesn't contain definition for Rows"
|
|
|
|
|
sorry,
change it as
if(ds.Tables[0].Rows.count)
|
|
|
|
|
thnx its working thank u very much
|
|
|
|
|
I suggest you to always check count before fetching indexed elements.
if(ds.Tables.count >0)
{
if(ds.Tables[0].Rows.count > 0)
{
if(ds.Tables[0].Columns.Count >=2)
{
txtSFrom.Text = ds.Tables[0].Rows[0][0].ToString();
Txtprice.Text = ds.Tables[0].Rows[0][1].ToString();
}
}
}
like this. ![Rose | [Rose]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/rose.gif)
|
|
|
|
|
|
Cheers
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
