how to read stringbuilder

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Here I wrote some code to read an integer value from an sql server:

if (rdr.HasRows)
   {
     StringBuilder sb = new StringBuilder();
     string a;
     while (rdr.Read())
      {
        sb.Append(((int[field]).ToString());
        sb.Append(\n);
        a = sb.ToString().Trim();
        c1.Items.Insert(count1, a);
        sb.Length=0;
        count1++;
      }

   }

Now I do not understand how to read a numeric value and varchar.

Changes somewhere here:
sb.Append(((int[field]).ToString());

Posted 25-Jul-11 2:15am

kami124

Updated 25-Jul-11 2:20am

LittleYellowBird

v4

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2 solutions

Solution 2

If I understand your question correctly, use rdr["fieldname"].ToString() to read the values from the DataReader.

Posted 25-Jul-11 2:25am

Shameel

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OriginalGriff · Accepted Answer · 2011-07-25T02:26:00

When you read a field from the reader, you can cast it directly to the data format you stored it as:

int i = (int) rdr["intField"];           // Field: int
string s = (string) rdr["stringField"];  // Field: varchar
byte[] b = (byte[]) rdr["imageField"];   // Field: varbinary

You do not have to convert it to a string and add it to a StringBuilder, unless that is what you actually need to do!