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How to get selected item for DropDownList .And this DropDownList is inside GridView.
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"In the DropDownList Tasks menu, choose Edit DataBindings.
The SelectedValue property of the DropDownList control is selected in the DataBindings dialog box."
See here for a walkthrough.
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please clarity more.. and read the question.
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SqlConnection con1 = new SqlConnection();
con1.ConnectionString = ConfigurationManager.ConnectionStrings["Connectionstring"].ToString();
string sql1 = "select " + colu + " from " + tbl + " where " + cond1 + " ='" + value1 + "' and " + cond2 + " = " + value2 + "";
SqlCommand cmd1 = new SqlCommand(sql1, con1);
con1.Open();
SqlDataReader dr = cmd1.ExecuteReader();
while (dr.Read())
{
return dr["ZoneCode"].ToString();
}
con1.Close();
Error:
Compiler Error Message: CS0161: 'Adv.ReturnString(string, string, string, string, string, string)': not all code paths return a value
Line 51: public string ReturnString(string tbl, string colu, string cond1, string value1, string cond2, string value2)
p
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Remove the return from inside the while loop and place it outside.
Return a collection of ZoneCodes instead of doing what you have done above.
<pre>SqlConnection con1 = new SqlConnection();
con1.ConnectionString = ConfigurationManager.ConnectionStrings["Connectionstring"].ToString();
string sql1 = "select " + colu + " from " + tbl + " where " + cond1 + " ='" + value1 + "' and " + cond2 + " = " + value2 + "";
SqlCommand cmd1 = new SqlCommand(sql1, con1);
con1.Open();
SqlDataReader dr = cmd1.ExecuteReader();
List<string> objList = new List<string>();
while (dr.Read())
{
objList.Add(dr["ZoneCode"].ToString(););
}
return objList;
con1.Close();</pre>
You method signature will be
<pre>public List<string> ReturnString(string tbl, string colu, string cond1, string value1, string cond2, string value2)</pre>
Sorry. I cannot include this code in the <pre> tags. The generics part is getting messed up.
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Compiler Error Message: CS0246: The type or namespace name 'List' could not be found (are you missing a using directive or an assembly reference?)
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Abdul-Rhman Alsri wrote: Compiler Error Message: CS0246: The type or namespace name 'List' could not be found (are you missing a using directive or an assembly reference?)
You need to include the Systems.Collection.Generic namespace.
modified on Sunday, May 2, 2010 2:43 AM
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A slight correction to this code moves the line con1.Close before the return - it's unreachable code, but you could always set ExecuteReader with the parameter CommandBehavior.CloseConnection to shut the connection automatically. I'd also suggest wrapping the code in using blocks to trigger disposal of the objects.
using (SqlConnection con1 = new SqlConnection())
{
con1.ConnectionString = ConfigurationManager.ConnectionStrings["Connectionstring"].ToString();
string sql1 = "select " + colu + " from " + tbl + " where " + cond1 + " ='" + value1 + "' and " + cond2 + " = " + value2 + "";
using (SqlCommand cmd1 = new SqlCommand(sql1, con1))
{
con1.Open();
using (SqlDataReader dr = cmd1.ExecuteReader())
{
List<string> objList = new List<string>();
while (dr.Read())
{
objList.Add(dr["ZoneCode"].ToString(););
}
return objList;
}
}
}
"WPF has many lovers. It's a veritable porn star!" - Josh Smith As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.
My blog | My articles | MoXAML PowerToys | Onyx
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Thanks - I completely missed the close() statement.
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No problems. It's the joy of coding directly in the html textbox. 
"WPF has many lovers. It's a veritable porn star!" - Josh Smith As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.
My blog | My articles | MoXAML PowerToys | Onyx
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Pete O'Hanlon wrote: No problems. It's the joy of coding directly in the html textbox
I messed up the "dry run".
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List<string> ZoneCode = ReturnZoneCode("select ZoneCode from AdZone where ID = 20 and AccountID=530");
TextBox1.Text = Convert.ToString(ZoneCode.ToString());
In the code above I called the function(Note: I edited the signature) and I want to bind the returned List<string> into a textbox.
Problem what I have that the Textbox is not bounded the the value returned from the call, but it had the following:
"System.Collections.Generic.List`1[System.String]"
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That's because ToString returns this type of information on a list. If you want to display the values, you need to actually bind to an individual item.
"WPF has many lovers. It's a veritable porn star!" - Josh Smith As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.
My blog | My articles | MoXAML PowerToys | Onyx
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Well, suppose you wanted to display a list of all of the items in a textbox, you could use:
private void BindZones(List<string> zones)
{
StringBuilder sb = new StringBuilder();
foreach (string item in zones)
{
sb.AppendFormat("{0}{1}", item, Environment.NewLine);
}
TextBox1.Text = sb.ToString();
}To be honest though - you would be better off displaying this in a ListBox rather than a Textbox.
"WPF has many lovers. It's a veritable porn star!" - Josh Smith As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.
My blog | My articles | MoXAML PowerToys | Onyx
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I got a null value.
please help me to return a string and not
List<string>
I'd like to change to the previous one...
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Your code is missing - please show it.
"WPF has many lovers. It's a veritable porn star!" - Josh Smith As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.
My blog | My articles | MoXAML PowerToys | Onyx
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I want the function to return a string and not a list string
Function:
public List<string> ReturnZoneCode(string sql1)
{
using (SqlConnection con1 = new SqlConnection())
{
con1.ConnectionString = ConfigurationManager.ConnectionStrings["Connectionstring"].ToString();
using (SqlCommand cmd1 = new SqlCommand(sql1, con1))
{
con1.Open();
using (SqlDataReader dr = cmd1.ExecuteReader())
{
List<string> objList = new List<string>();
while (dr.Read())
{
objList.Add(dr["ZoneCode"].ToString());
}
return objList;
}
}
}
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Use a StringBuilder instead of a list.
"WPF has many lovers. It's a veritable porn star!" - Josh Smith As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.
My blog | My articles | MoXAML PowerToys | Onyx
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Error in insert
string a = "'msman88'";
Needed to be inserted as 'msman88'
Error :
Incorrect syntax near 'msman88'.
Line 70: cmd_Account.ExecuteNonQuery();
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in SQL single quote's can be used to delimit string literals, so if you need them as part of your data, try one of the following:
1. use SQLParameter, which is always the better option as it prevents SQL Injection vulnerability;
2. or double the single quote(s) inside your data
Now why would you want single quotes at the extremes of your data in the first place? Maybe you are misinterpreting some piece of documentation?
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Abdul-Rhman Alsri wrote: string a = "'msman88'";
Try string a = @"''msman88''".
modified on Saturday, May 1, 2010 11:22 PM
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Hi
How can i bring my graphic shape to Front of all Controls in form.
my graphic is :
private void Form1_Paint(object sender, PaintEventArgs e)
{
Pen my2 = new Pen(Color.Black, 0.1f);
my2.DashStyle = System.Drawing.Drawing2D.DashStyle.DashDot;
e.Graphics.DrawRectangle(my2, 99, 52, 133, 99);
}
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Don't think you can... You cannot set the z-index of controls like on a web form for example...
Why do you need your drawing in front of other controls?
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AFAIK you can't - a form is drawn first then the controls are drawn on the form's surface.
The easiest way to acheive what you want is probably to create a DashedRectangle control that has a transparent background and make sure that's the last control to be drawn.
DaveIf this helped, please vote & accept answer!
Binging is like googling, it just feels dirtier. (Pete O'Hanlon)
BTW, in software, hope and pray is not a viable strategy. (Luc Pattyn)
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