Databases
StackOverflow2013
Postsdbo
POHow to increment the string value during run time without using dr.read() and store it in the oledb db?
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHow to increment the string value during run time without using dr.read() and store it in the oledb db?
    primarykey
    data
    text
    <p>Here is my code, everything is working fine the only problem is with the ReadData() method in which i want the string value to be increment i.e AM0001,AM0002,AM0003 etc. This is happening till the execution of the program once i stop the execution of program, the second time when i run the program the same value i.e AM0001 is getting return. Due to this i am getting a error from oledb because of AM0001 is a primary key field.</p> <p>This is my code:</p> <pre><code>class Jewellery : Connectionstr { string lmcode; public string LM_code { get { return lmcode;} set { lmcode = ReadData();} } string mname; public string M_Name { get { return mname; } set { mname = value;} } string desc; public string Desc { get { return desc; } set { desc = value; } } public string ReadData() { string jid = string.Empty; string displayString = string.Empty; String query = "select max(LM_code)from Master_Accounts"; Datamanager.RunExecuteReader(Constr,query); jid = LM_code;// this is working on first execution, the second time when i run the program the value null defined in LM_code. if (string.IsNullOrEmpty(jid)) { jid = "AM0000";//This string value has to increment at every time, but it is getting increment only one time. } int len = jid.Length; string split = jid.Substring(2, len - 2); int num = Convert.ToInt32(split); num++; displayString = jid.Substring(0, 2) + num.ToString("0000"); return displayString; } public void add() { String query ="insert into Master_Accounts values ('" + LM_code + "','" + M_Name + "','" + Desc + "')"; Datamanager.RunExecuteNonQuery(Constr , query); } </code></pre> <p>Any help will be appreciated.</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USsameer
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POHow to increment the string value during run time without using dr.read() and store it in the oledb db?
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. POHow to increment the string value during run time without using dr.read() and store it in the oledb db?
      1. USsameer
      1. VTFavorite
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload